31090280693 has 4 divisors (see below), whose sum is σ = 31205005248. Its totient is φ = 30975556140.

The previous prime is 31090280681. The next prime is 31090280699. The reversal of 31090280693 is 39608209013.

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 31090280693 - 2¹² = 31090276597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31090280693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31090280699) 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, 57361871 + ... + 57362412.

It is an arithmetic number, because the mean of its divisors is an integer number (7801251312).

Almost surely, 2^31090280693 is an apocalyptic number.

It is an amenable number.

31090280693 is a deficient number, since it is larger than the sum of its proper divisors (114724555).

31090280693 is a wasteful number, since it uses less digits than its factorization.

31090280693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114724554.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 31090280693 in words is "thirty-one billion, ninety million, two hundred eighty thousand, six hundred ninety-three".