31797423 has 18 divisors (see below), whose sum is σ = 53429064. Its totient is φ = 18169704.

The previous prime is 31797379. The next prime is 31797487. The reversal of 31797423 is 32479713.

It is not a de Polignac number, because 31797423 - 2¹⁰ = 31796399 is a prime.

It is a super-2 number, since 2×31797423² = 2022152218881858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31797823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35611 + ... + 36492.

Almost surely, 2^31797423 is an apocalyptic number.

31797423 is a deficient number, since it is larger than the sum of its proper divisors (21631641).

31797423 is a wasteful number, since it uses less digits than its factorization.

31797423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72123 (or 72113 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 31797423 is about 5638.9203753910. The cubic root of 31797423 is about 316.8088522454.

The spelling of 31797423 in words is "thirty-one million, seven hundred ninety-seven thousand, four hundred twenty-three".