31648797 has 6 divisors (see below), whose sum is σ = 45714942. Its totient is φ = 21099192.

The previous prime is 31648789. The next prime is 31648807. The reversal of 31648797 is 79784613.

It can be written as a sum of positive squares in only one way, i.e., 24710841 + 6937956 = 4971^2 + 2634^2 .

It is not a de Polignac number, because 31648797 - 2³ = 31648789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31648717) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1758258 + ... + 1758275.

It is an arithmetic number, because the mean of its divisors is an integer number (7619157).

Almost surely, 2^31648797 is an apocalyptic number.

It is an amenable number.

31648797 is a deficient number, since it is larger than the sum of its proper divisors (14066145).

31648797 is a wasteful number, since it uses less digits than its factorization.

31648797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516539 (or 3516536 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 31648797 is about 5625.7263531032. The cubic root of 31648797 is about 316.3144768993.

The spelling of 31648797 in words is "thirty-one million, six hundred forty-eight thousand, seven hundred ninety-seven".