73415681 has 2 divisors, whose sum is σ = 73415682. Its totient is φ = 73415680.

The previous prime is 73415651. The next prime is 73415723. The reversal of 73415681 is 18651437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45495025 + 27920656 = 6745^2 + 5284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73415681 is a prime.

It is a super-2 number, since 2×73415681² = 10779724433387522, which contains 22 as substring.

It is equal to p_4306958 and since 73415681 and 4306958 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 (73415651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36707840 + 36707841.

It is an arithmetic number, because the mean of its divisors is an integer number (36707841).

Almost surely, 2^73415681 is an apocalyptic number.

It is an amenable number.

73415681 is a deficient number, since it is larger than the sum of its proper divisors (1).

73415681 is an equidigital number, since it uses as much as digits as its factorization.

73415681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 73415681 is about 8568.2951046285. The cubic root of 73415681 is about 418.7256935175.

The spelling of 73415681 in words is "seventy-three million, four hundred fifteen thousand, six hundred eighty-one".