72917699 has 4 divisors (see below), whose sum is σ = 73187040. Its totient is φ = 72648360.

The previous prime is 72917681. The next prime is 72917707. The reversal of 72917699 is 99671927.

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 72917699 - 2¹⁶ = 72852163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72917399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134264 + ... + 134805.

It is an arithmetic number, because the mean of its divisors is an integer number (18296760).

Almost surely, 2^72917699 is an apocalyptic number.

72917699 is a deficient number, since it is larger than the sum of its proper divisors (269341).

72917699 is a wasteful number, since it uses less digits than its factorization.

72917699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269340.

The product of its digits is 428652, while the sum is 50.

The square root of 72917699 is about 8539.1860853362. The cubic root of 72917699 is about 417.7767994833.

The spelling of 72917699 in words is "seventy-two million, nine hundred seventeen thousand, six hundred ninety-nine".