72899439 has 4 divisors (see below), whose sum is σ = 97199256. Its totient is φ = 48599624.

The previous prime is 72899429. The next prime is 72899441. The reversal of 72899439 is 93499827.

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 72899439 - 2⁴ = 72899423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72899391 and 72899400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72899419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12149904 + ... + 12149909.

It is an arithmetic number, because the mean of its divisors is an integer number (24299814).

Almost surely, 2^72899439 is an apocalyptic number.

72899439 is a deficient number, since it is larger than the sum of its proper divisors (24299817).

72899439 is a wasteful number, since it uses less digits than its factorization.

72899439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24299816.

The product of its digits is 979776, while the sum is 51.

The square root of 72899439 is about 8538.1168298402. The cubic root of 72899439 is about 417.7419234457.

The spelling of 72899439 in words is "seventy-two million, eight hundred ninety-nine thousand, four hundred thirty-nine".