72706699 has 4 divisors (see below), whose sum is σ = 78299536. Its totient is φ = 67113864.

The previous prime is 72706691. The next prime is 72706721. The reversal of 72706699 is 99660727.

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

It is a cyclic number.

It is not a de Polignac number, because 72706699 - 2³ = 72706691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72706691) 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, 2796399 + ... + 2796424.

It is an arithmetic number, because the mean of its divisors is an integer number (19574884).

Almost surely, 2^72706699 is an apocalyptic number.

72706699 is a deficient number, since it is larger than the sum of its proper divisors (5592837).

72706699 is a wasteful number, since it uses less digits than its factorization.

72706699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5592836.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 72706699 is about 8526.8223272213. The cubic root of 72706699 is about 417.3734403104.

The spelling of 72706699 in words is "seventy-two million, seven hundred six thousand, six hundred ninety-nine".