31725097 has 2 divisors, whose sum is σ = 31725098. Its totient is φ = 31725096.

The previous prime is 31725091. The next prime is 31725131. The reversal of 31725097 is 79052713.

It is an a-pointer prime, because the next prime (31725131) can be obtained adding 31725097 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24413481 + 7311616 = 4941^2 + 2704^2 .

It is an emirp because it is prime and its reverse (79052713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31725097 - 2¹⁵ = 31692329 is a prime.

It is not a weakly prime, because it can be changed into another prime (31725091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15862548 + 15862549.

It is an arithmetic number, because the mean of its divisors is an integer number (15862549).

Almost surely, 2^31725097 is an apocalyptic number.

It is an amenable number.

31725097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31725097 is an equidigital number, since it uses as much as digits as its factorization.

31725097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 31725097 is about 5632.5036173979. The cubic root of 31725097 is about 316.5684668116.

The spelling of 31725097 in words is "thirty-one million, seven hundred twenty-five thousand, ninety-seven".