1069728431 has 2 divisors, whose sum is σ = 1069728432. Its totient is φ = 1069728430.

The previous prime is 1069728427. The next prime is 1069728463. The reversal of 1069728431 is 1348279601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1069728431 - 2² = 1069728427 is a prime.

It is a super-2 number, since 2×1069728431² = 2288637832179443522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1069728631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534864215 + 534864216.

It is an arithmetic number, because the mean of its divisors is an integer number (534864216).

Almost surely, 2^1069728431 is an apocalyptic number.

1069728431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1069728431 is an equidigital number, since it uses as much as digits as its factorization.

1069728431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1069728431 is about 32706.7031508833. The cubic root of 1069728431 is about 1022.7225838405.

The spelling of 1069728431 in words is "one billion, sixty-nine million, seven hundred twenty-eight thousand, four hundred thirty-one".