72706659 has 4 divisors (see below), whose sum is σ = 96942216. Its totient is φ = 48471104.

The previous prime is 72706649. The next prime is 72706691. The reversal of 72706659 is 95660727.

It is a happy number.

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 72706659 - 2⁷ = 72706531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72706659.

It is not an unprimeable number, because it can be changed into a prime (72706609) 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, 12117774 + ... + 12117779.

It is an arithmetic number, because the mean of its divisors is an integer number (24235554).

Almost surely, 2^72706659 is an apocalyptic number.

72706659 is a deficient number, since it is larger than the sum of its proper divisors (24235557).

72706659 is a wasteful number, since it uses less digits than its factorization.

72706659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24235556.

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 72706659 is about 8526.8199816813. The cubic root of 72706659 is about 417.3733637702.

The spelling of 72706659 in words is "seventy-two million, seven hundred six thousand, six hundred fifty-nine".