31243376397 has 8 divisors (see below), whose sum is σ = 42125901120. Its totient is φ = 20594884640.

The previous prime is 31243376369. The next prime is 31243376401. The reversal of 31243376397 is 79367334213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31243376397 - 2¹² = 31243372301 is a prime.

It is a super-2 number, since 2×31243376397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243376797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58507929 + ... + 58508462.

It is an arithmetic number, because the mean of its divisors is an integer number (5265737640).

Almost surely, 2^31243376397 is an apocalyptic number.

It is an amenable number.

31243376397 is a deficient number, since it is larger than the sum of its proper divisors (10882524723).

31243376397 is a wasteful number, since it uses less digits than its factorization.

31243376397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117016483.

The product of its digits is 1714608, while the sum is 48.

The spelling of 31243376397 in words is "thirty-one billion, two hundred forty-three million, three hundred seventy-six thousand, three hundred ninety-seven".