72861279 has 8 divisors (see below), whose sum is σ = 97192752. Its totient is φ = 48552000.

The previous prime is 72861203. The next prime is 72861281. The reversal of 72861279 is 97216827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72861279 - 2¹¹ = 72859231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72861279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72863279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4957 + ... + 13049.

It is an arithmetic number, because the mean of its divisors is an integer number (12149094).

Almost surely, 2^72861279 is an apocalyptic number.

72861279 is a deficient number, since it is larger than the sum of its proper divisors (24331473).

72861279 is a wasteful number, since it uses less digits than its factorization.

72861279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11097.

The product of its digits is 84672, while the sum is 42.

The square root of 72861279 is about 8535.8818525094. The cubic root of 72861279 is about 417.6690202139.

The spelling of 72861279 in words is "seventy-two million, eight hundred sixty-one thousand, two hundred seventy-nine".