76360721 has 4 divisors (see below), whose sum is σ = 76382244. Its totient is φ = 76339200.

The previous prime is 76360717. The next prime is 76360723. The reversal of 76360721 is 12706367.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65044225 + 11316496 = 8065^2 + 3364^2 .

It is a cyclic number.

It is not a de Polignac number, because 76360721 - 2² = 76360717 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76360723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040 + ... + 13001.

It is an arithmetic number, because the mean of its divisors is an integer number (19095561).

Almost surely, 2^76360721 is an apocalyptic number.

It is an amenable number.

76360721 is a deficient number, since it is larger than the sum of its proper divisors (21523).

76360721 is a wasteful number, since it uses less digits than its factorization.

76360721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21522.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 76360721 is about 8738.4621644772. The cubic root of 76360721 is about 424.2514546922.

The spelling of 76360721 in words is "seventy-six million, three hundred sixty thousand, seven hundred twenty-one".