31530097 has 2 divisors, whose sum is σ = 31530098. Its totient is φ = 31530096.

The previous prime is 31530061. The next prime is 31530143. The reversal of 31530097 is 79003513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29170801 + 2359296 = 5401^2 + 1536^2 .

It is a cyclic number.

It is not a de Polignac number, because 31530097 - 2⁷ = 31529969 is a prime.

It is not a weakly prime, because it can be changed into another prime (31530017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15765048 + 15765049.

It is an arithmetic number, because the mean of its divisors is an integer number (15765049).

Almost surely, 2^31530097 is an apocalyptic number.

It is an amenable number.

31530097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31530097 is an equidigital number, since it uses as much as digits as its factorization.

31530097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 31530097 is about 5615.1666938747. The cubic root of 31530097 is about 315.9185317143.

The spelling of 31530097 in words is "thirty-one million, five hundred thirty thousand, ninety-seven".