72899863 has 4 divisors (see below), whose sum is σ = 72920520. Its totient is φ = 72879208.

The previous prime is 72899851. The next prime is 72899873. The reversal of 72899863 is 36899827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72899863 is a prime.

It is a super-3 number, since 3×72899863³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72899863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72899873) 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, 3553 + ... + 12586.

It is an arithmetic number, because the mean of its divisors is an integer number (18230130).

Almost surely, 2^72899863 is an apocalyptic number.

72899863 is a deficient number, since it is larger than the sum of its proper divisors (20657).

72899863 is a wasteful number, since it uses less digits than its factorization.

72899863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20656.

The product of its digits is 1306368, while the sum is 52.

The square root of 72899863 is about 8538.1416596353. The cubic root of 72899863 is about 417.7427333387.

The spelling of 72899863 in words is "seventy-two million, eight hundred ninety-nine thousand, eight hundred sixty-three".