1031135399 has 32 divisors (see below), whose sum is σ = 1241349120. Its totient is φ = 838252800.

The previous prime is 1031135393. The next prime is 1031135411. The reversal of 1031135399 is 9935311301.

It is not a de Polignac number, because 1031135399 - 2⁴ = 1031135383 is a prime.

It is a super-2 number, since 2×1031135399² = 2126480422141778402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031135393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1633814 + ... + 1634444.

It is an arithmetic number, because the mean of its divisors is an integer number (38792160).

Almost surely, 2^1031135399 is an apocalyptic number.

1031135399 is a deficient number, since it is larger than the sum of its proper divisors (210213721).

1031135399 is an equidigital number, since it uses as much as digits as its factorization.

1031135399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 10935, while the sum is 35.

The square root of 1031135399 is about 32111.2970619376. The cubic root of 1031135399 is about 1010.2725791108.

The spelling of 1031135399 in words is "one billion, thirty-one million, one hundred thirty-five thousand, three hundred ninety-nine".