631336073 has 2 divisors, whose sum is σ = 631336074. Its totient is φ = 631336072.

The previous prime is 631335989. The next prime is 631336087. The reversal of 631336073 is 370633136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404291449 + 227044624 = 20107^2 + 15068^2 .

It is a cyclic number.

It is not a de Polignac number, because 631336073 - 2²² = 627141769 is a prime.

It is a super-2 number, since 2×631336073² = 797170474142122658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (631338073) 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, 315668036 + 315668037.

It is an arithmetic number, because the mean of its divisors is an integer number (315668037).

Almost surely, 2^631336073 is an apocalyptic number.

It is an amenable number.

631336073 is a deficient number, since it is larger than the sum of its proper divisors (1).

631336073 is an equidigital number, since it uses as much as digits as its factorization.

631336073 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 32.

The square root of 631336073 is about 25126.4019111372. The cubic root of 631336073 is about 857.8674732778.

The spelling of 631336073 in words is "six hundred thirty-one million, three hundred thirty-six thousand, seventy-three".