73515961 has 2 divisors, whose sum is σ = 73515962. Its totient is φ = 73515960.

The previous prime is 73515907. The next prime is 73515971. The reversal of 73515961 is 16951537.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61716736 + 11799225 = 7856^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 73515961 - 2⁷ = 73515833 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73515961.

It is not a weakly prime, because it can be changed into another prime (73515901) 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, 36757980 + 36757981.

It is an arithmetic number, because the mean of its divisors is an integer number (36757981).

Almost surely, 2^73515961 is an apocalyptic number.

It is an amenable number.

73515961 is a deficient number, since it is larger than the sum of its proper divisors (1).

73515961 is an equidigital number, since it uses as much as digits as its factorization.

73515961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 37.

The square root of 73515961 is about 8574.1449136342. The cubic root of 73515961 is about 418.9162554802.

The spelling of 73515961 in words is "seventy-three million, five hundred fifteen thousand, nine hundred sixty-one".