1090397129 has 4 divisors (see below), whose sum is σ = 1127997060. Its totient is φ = 1052797200.

The previous prime is 1090397107. The next prime is 1090397171. The reversal of 1090397129 is 9217930901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 562638400 + 527758729 = 23720^2 + 22973^2 .

It is a cyclic number.

It is not a de Polignac number, because 1090397129 - 2²⁴ = 1073619913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1090397929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18799922 + ... + 18799979.

It is an arithmetic number, because the mean of its divisors is an integer number (281999265).

Almost surely, 2^1090397129 is an apocalyptic number.

It is an amenable number.

1090397129 is a deficient number, since it is larger than the sum of its proper divisors (37599931).

1090397129 is an equidigital number, since it uses as much as digits as its factorization.

1090397129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37599930.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 1090397129 is about 33021.1618360106. The cubic root of 1090397129 is about 1029.2674368141.

The spelling of 1090397129 in words is "one billion, ninety million, three hundred ninety-seven thousand, one hundred twenty-nine".