1290327169 has 4 divisors (see below), whose sum is σ = 1297012996. Its totient is φ = 1283641344.

The previous prime is 1290327151. The next prime is 1290327173. The reversal of 1290327169 is 9617230921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9617230921 = 151 ⋅63690271.

It can be written as a sum of positive squares in 2 ways, for example, as 704106225 + 586220944 = 26535^2 + 24212^2 .

It is a cyclic number.

It is not a de Polignac number, because 1290327169 - 2¹³ = 1290318977 is a prime.

It is a super-2 number, since 2×1290327169² = 3329888406119109122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1290327119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3342624 + ... + 3343009.

It is an arithmetic number, because the mean of its divisors is an integer number (324253249).

Almost surely, 2^1290327169 is an apocalyptic number.

It is an amenable number.

1290327169 is a deficient number, since it is larger than the sum of its proper divisors (6685827).

1290327169 is an equidigital number, since it uses as much as digits as its factorization.

1290327169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6685826.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 1290327169 is about 35921.1242724946. The cubic root of 1290327169 is about 1088.6792546136.

It can be divided in two parts, 1290327 and 169, that added together give a square (1290496 = 1136²).

The spelling of 1290327169 in words is "one billion, two hundred ninety million, three hundred twenty-seven thousand, one hundred sixty-nine".