72759399 has 4 divisors (see below), whose sum is σ = 97012536. Its totient is φ = 48506264.

The previous prime is 72759391. The next prime is 72759403. The reversal of 72759399 is 99395727.

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 72759399 - 2³ = 72759391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72759391) 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, 12126564 + ... + 12126569.

It is an arithmetic number, because the mean of its divisors is an integer number (24253134).

Almost surely, 2^72759399 is an apocalyptic number.

72759399 is a deficient number, since it is larger than the sum of its proper divisors (24253137).

72759399 is a wasteful number, since it uses less digits than its factorization.

72759399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24253136.

The product of its digits is 1071630, while the sum is 51.

The square root of 72759399 is about 8529.9120159589. The cubic root of 72759399 is about 417.4742575592.

The spelling of 72759399 in words is "seventy-two million, seven hundred fifty-nine thousand, three hundred ninety-nine".