31134404797 has 4 divisors (see below), whose sum is σ = 31484229660. Its totient is φ = 30784579936.

The previous prime is 31134404789. The next prime is 31134404801. The reversal of 31134404797 is 79740443113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79740443113 = 19 ⋅4196865427.

It can be written as a sum of positive squares in 2 ways, for example, as 12097580121 + 19036824676 = 109989^2 + 137974^2 .

It is a cyclic number.

It is not a de Polignac number, because 31134404797 - 2³ = 31134404789 is a prime.

It is a super-2 number, since 2×31134404797² (a number of 22 digits) 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 (31134404597) 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, 174912298 + ... + 174912475.

It is an arithmetic number, because the mean of its divisors is an integer number (7871057415).

Almost surely, 2^31134404797 is an apocalyptic number.

It is an amenable number.

31134404797 is a deficient number, since it is larger than the sum of its proper divisors (349824863).

31134404797 is an equidigital number, since it uses as much as digits as its factorization.

31134404797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349824862.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 31134404797 in words is "thirty-one billion, one hundred thirty-four million, four hundred four thousand, seven hundred ninety-seven".