72974787 has 4 divisors (see below), whose sum is σ = 97299720. Its totient is φ = 48649856.

The previous prime is 72974777. The next prime is 72974807. The reversal of 72974787 is 78747927.

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 72974787 - 2¹⁰ = 72973763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72974747) 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 3 ways as a sum of consecutive naturals, for example, 12162462 + ... + 12162467.

It is an arithmetic number, because the mean of its divisors is an integer number (24324930).

Almost surely, 2^72974787 is an apocalyptic number.

72974787 is a deficient number, since it is larger than the sum of its proper divisors (24324933).

72974787 is a wasteful number, since it uses less digits than its factorization.

72974787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24324932.

The product of its digits is 1382976, while the sum is 51.

The square root of 72974787 is about 8542.5281386718. The cubic root of 72974787 is about 417.8857982624.

The spelling of 72974787 in words is "seventy-two million, nine hundred seventy-four thousand, seven hundred eighty-seven".