72986279 has 4 divisors (see below), whose sum is σ = 73219776. Its totient is φ = 72752784.

The previous prime is 72986267. The next prime is 72986281. The reversal of 72986279 is 97268927.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97268927 = 7 ⋅13895561.

It is a cyclic number.

It is not a de Polignac number, because 72986279 - 2²⁰ = 71937703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72986209) 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, 116279 + ... + 116904.

It is an arithmetic number, because the mean of its divisors is an integer number (18304944).

Almost surely, 2^72986279 is an apocalyptic number.

72986279 is a deficient number, since it is larger than the sum of its proper divisors (233497).

72986279 is a wasteful number, since it uses less digits than its factorization.

72986279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233496.

The product of its digits is 762048, while the sum is 50.

The square root of 72986279 is about 8543.2007467927. The cubic root of 72986279 is about 417.9077331969.

The spelling of 72986279 in words is "seventy-two million, nine hundred eighty-six thousand, two hundred seventy-nine".