31330973 has 2 divisors, whose sum is σ = 31330974. Its totient is φ = 31330972.

The previous prime is 31330967. The next prime is 31330979. The reversal of 31330973 is 37903313.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (31330967) and next prime (31330979).

It can be written as a sum of positive squares in only one way, i.e., 26759929 + 4571044 = 5173^2 + 2138^2 .

It is a cyclic number.

It is not a de Polignac number, because 31330973 - 2⁶ = 31330909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31330979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665486 + 15665487.

It is an arithmetic number, because the mean of its divisors is an integer number (15665487).

Almost surely, 2^31330973 is an apocalyptic number.

It is an amenable number.

31330973 is a deficient number, since it is larger than the sum of its proper divisors (1).

31330973 is an equidigital number, since it uses as much as digits as its factorization.

31330973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 29.

The square root of 31330973 is about 5597.4077035714. The cubic root of 31330973 is about 315.2520800691.

The spelling of 31330973 in words is "thirty-one million, three hundred thirty thousand, nine hundred seventy-three".