73609931 has 2 divisors, whose sum is σ = 73609932. Its totient is φ = 73609930.

The previous prime is 73609897. The next prime is 73609957. The reversal of 73609931 is 13990637.

It is a strong prime.

It is an emirp because it is prime and its reverse (13990637) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73609931 is a prime.

It is a super-2 number, since 2×73609931² = 10836843883649522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73609231) 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, 36804965 + 36804966.

It is an arithmetic number, because the mean of its divisors is an integer number (36804966).

Almost surely, 2^73609931 is an apocalyptic number.

73609931 is a deficient number, since it is larger than the sum of its proper divisors (1).

73609931 is an equidigital number, since it uses as much as digits as its factorization.

73609931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 73609931 is about 8579.6230103659. The cubic root of 73609931 is about 419.0946693430.

The spelling of 73609931 in words is "seventy-three million, six hundred nine thousand, nine hundred thirty-one".