72869739 has 4 divisors (see below), whose sum is σ = 97159656. Its totient is φ = 48579824.

The previous prime is 72869723. The next prime is 72869749. The reversal of 72869739 is 93796827.

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 72869739 - 2⁴ = 72869723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72869691 and 72869700.

It is not an unprimeable number, because it can be changed into a prime (72869749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12144954 + ... + 12144959.

It is an arithmetic number, because the mean of its divisors is an integer number (24289914).

Almost surely, 2^72869739 is an apocalyptic number.

72869739 is a deficient number, since it is larger than the sum of its proper divisors (24289917).

72869739 is a wasteful number, since it uses less digits than its factorization.

72869739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24289916.

The product of its digits is 1143072, while the sum is 51.

The square root of 72869739 is about 8536.3773932506. The cubic root of 72869739 is about 417.6851849185.

The spelling of 72869739 in words is "seventy-two million, eight hundred sixty-nine thousand, seven hundred thirty-nine".