31563089 has 2 divisors, whose sum is σ = 31563090. Its totient is φ = 31563088.

The previous prime is 31563073. The next prime is 31563127. The reversal of 31563089 is 98036513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22515025 + 9048064 = 4745^2 + 3008^2 .

It is a cyclic number.

It is not a de Polignac number, because 31563089 - 2⁴ = 31563073 is a prime.

It is a Chen prime.

It is equal to p_1948472 and since 31563089 and 1948472 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31563029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15781544 + 15781545.

It is an arithmetic number, because the mean of its divisors is an integer number (15781545).

Almost surely, 2^31563089 is an apocalyptic number.

It is an amenable number.

31563089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31563089 is an equidigital number, since it uses as much as digits as its factorization.

31563089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 31563089 is about 5618.1036836285. The cubic root of 31563089 is about 316.0286820358.

The spelling of 31563089 in words is "thirty-one million, five hundred sixty-three thousand, eighty-nine".