72924947 has 4 divisors (see below), whose sum is σ = 74620920. Its totient is φ = 71228976.

The previous prime is 72924941. The next prime is 72924977. The reversal of 72924947 is 74942927.

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 72924947 - 2¹⁸ = 72662803 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72924898 and 72924907.

It is not an unprimeable number, because it can be changed into a prime (72924941) 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, 847922 + ... + 848007.

It is an arithmetic number, because the mean of its divisors is an integer number (18655230).

Almost surely, 2^72924947 is an apocalyptic number.

72924947 is a deficient number, since it is larger than the sum of its proper divisors (1695973).

72924947 is a wasteful number, since it uses less digits than its factorization.

72924947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695972.

The product of its digits is 254016, while the sum is 44.

The square root of 72924947 is about 8539.6104712100. The cubic root of 72924947 is about 417.7906413258.

The spelling of 72924947 in words is "seventy-two million, nine hundred twenty-four thousand, nine hundred forty-seven".