31349239097 has 16 divisors (see below), whose sum is σ = 34742254272. Its totient is φ = 28047539520.

The previous prime is 31349239091. The next prime is 31349239157. The reversal of 31349239097 is 79093294313.

It is a de Polignac number, because none of the positive numbers 2^k-31349239097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31349239091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786083 + ... + 824999.

It is an arithmetic number, because the mean of its divisors is an integer number (2171390892).

Almost surely, 2^31349239097 is an apocalyptic number.

It is an amenable number.

31349239097 is a deficient number, since it is larger than the sum of its proper divisors (3393015175).

31349239097 is a wasteful number, since it uses less digits than its factorization.

31349239097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40088.

The product of its (nonzero) digits is 1102248, while the sum is 50.

The spelling of 31349239097 in words is "thirty-one billion, three hundred forty-nine million, two hundred thirty-nine thousand, ninety-seven".