31400933 has 2 divisors, whose sum is σ = 31400934. Its totient is φ = 31400932.

The previous prime is 31400893. The next prime is 31400947. The reversal of 31400933 is 33900413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29084449 + 2316484 = 5393^2 + 1522^2 .

It is a cyclic number.

It is not a de Polignac number, because 31400933 - 2⁶ = 31400869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31400899 and 31400908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31400983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700466 + 15700467.

It is an arithmetic number, because the mean of its divisors is an integer number (15700467).

Almost surely, 2^31400933 is an apocalyptic number.

It is an amenable number.

31400933 is a deficient number, since it is larger than the sum of its proper divisors (1).

31400933 is an equidigital number, since it uses as much as digits as its factorization.

31400933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 31400933 is about 5603.6535403253. The cubic root of 31400933 is about 315.4865513492.

The spelling of 31400933 in words is "thirty-one million, four hundred thousand, nine hundred thirty-three".