72974905 has 16 divisors (see below), whose sum is σ = 89579520. Its totient is φ = 57049408.

The previous prime is 72974903. The next prime is 72974959. The reversal of 72974905 is 50947927.

It is a cyclic number.

It is not a de Polignac number, because 72974905 - 2¹ = 72974903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72974903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101136 + ... + 101854.

It is an arithmetic number, because the mean of its divisors is an integer number (5598720).

Almost surely, 2^72974905 is an apocalyptic number.

It is an amenable number.

72974905 is a deficient number, since it is larger than the sum of its proper divisors (16604615).

72974905 is a wasteful number, since it uses less digits than its factorization.

72974905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 72974905 is about 8542.5350452895. The cubic root of 72974905 is about 417.8860235022.

The spelling of 72974905 in words is "seventy-two million, nine hundred seventy-four thousand, nine hundred five".