72949679 has 4 divisors (see below), whose sum is σ = 79581480. Its totient is φ = 66317880.

The previous prime is 72949673. The next prime is 72949693. The reversal of 72949679 is 97694927.

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: 97694927 = 11 ⋅8881357.

It is a cyclic number.

It is not a de Polignac number, because 72949679 - 2⁸ = 72949423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72949679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72949673) 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, 3315884 + ... + 3315905.

It is an arithmetic number, because the mean of its divisors is an integer number (19895370).

Almost surely, 2^72949679 is an apocalyptic number.

72949679 is a deficient number, since it is larger than the sum of its proper divisors (6631801).

72949679 is a wasteful number, since it uses less digits than its factorization.

72949679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6631800.

The product of its digits is 1714608, while the sum is 53.

The square root of 72949679 is about 8541.0584238723. The cubic root of 72949679 is about 417.8378662728.

The spelling of 72949679 in words is "seventy-two million, nine hundred forty-nine thousand, six hundred seventy-nine".