31764121 has 2 divisors, whose sum is σ = 31764122. Its totient is φ = 31764120.

The previous prime is 31764113. The next prime is 31764137. The reversal of 31764121 is 12146713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25613721 + 6150400 = 5061^2 + 2480^2 .

It is a cyclic number.

It is not a de Polignac number, because 31764121 - 2³ = 31764113 is a prime.

It is not a weakly prime, because it can be changed into another prime (31764101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15882060 + 15882061.

It is an arithmetic number, because the mean of its divisors is an integer number (15882061).

Almost surely, 2^31764121 is an apocalyptic number.

It is an amenable number.

31764121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31764121 is an equidigital number, since it uses as much as digits as its factorization.

31764121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 31764121 is about 5635.9667316264. The cubic root of 31764121 is about 316.6982137854.

The spelling of 31764121 in words is "thirty-one million, seven hundred sixty-four thousand, one hundred twenty-one".