31663097 has 2 divisors, whose sum is σ = 31663098. Its totient is φ = 31663096.

The previous prime is 31663081. The next prime is 31663103. The reversal of 31663097 is 79036613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31483321 + 179776 = 5611^2 + 424^2 .

It is an emirp because it is prime and its reverse (79036613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31663097 - 2⁴ = 31663081 is a prime.

It is not a weakly prime, because it can be changed into another prime (31663057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15831548 + 15831549.

It is an arithmetic number, because the mean of its divisors is an integer number (15831549).

Almost surely, 2^31663097 is an apocalyptic number.

It is an amenable number.

31663097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31663097 is an equidigital number, since it uses as much as digits as its factorization.

31663097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 31663097 is about 5626.9971565658. The cubic root of 31663097 is about 316.3621102625.

The spelling of 31663097 in words is "thirty-one million, six hundred sixty-three thousand, ninety-seven".