1369279997 has 4 divisors (see below), whose sum is σ = 1369632960. Its totient is φ = 1368927036.

The previous prime is 1369279991. The next prime is 1369280009. The reversal of 1369279997 is 7999729631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1369279997 - 2²⁰ = 1368231421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1369279991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170597 + ... + 178442.

It is an arithmetic number, because the mean of its divisors is an integer number (342408240).

Almost surely, 2^1369279997 is an apocalyptic number.

It is an amenable number.

1369279997 is a deficient number, since it is larger than the sum of its proper divisors (352963).

1369279997 is an equidigital number, since it uses as much as digits as its factorization.

1369279997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352962.

The product of its digits is 11573604, while the sum is 62.

The square root of 1369279997 is about 37003.7835497939. The cubic root of 1369279997 is about 1110.4459418050.

The spelling of 1369279997 in words is "one billion, three hundred sixty-nine million, two hundred seventy-nine thousand, nine hundred ninety-seven".