73612681 has 4 divisors (see below), whose sum is σ = 73649664. Its totient is φ = 73575700.

The previous prime is 73612667. The next prime is 73612691. The reversal of 73612681 is 18621637.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73612681 - 2¹¹ = 73610633 is a prime.

It is a super-2 number, since 2×73612681² = 10837653608015522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (73612661) 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 in 3 ways as a sum of consecutive naturals, for example, 15325 + ... + 19546.

It is an arithmetic number, because the mean of its divisors is an integer number (18412416).

Almost surely, 2^73612681 is an apocalyptic number.

It is an amenable number.

73612681 is a deficient number, since it is larger than the sum of its proper divisors (36983).

73612681 is a wasteful number, since it uses less digits than its factorization.

73612681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36982.

The product of its digits is 12096, while the sum is 34.

The square root of 73612681 is about 8579.7832723210. The cubic root of 73612681 is about 419.0998882764.

The spelling of 73612681 in words is "seventy-three million, six hundred twelve thousand, six hundred eighty-one".