72923945 has 8 divisors (see below), whose sum is σ = 87555840. Its totient is φ = 58307760.

The previous prime is 72923911. The next prime is 72923959. The reversal of 72923945 is 54932927.

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

It is not a de Polignac number, because 72923945 - 2⁸ = 72923689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12680 + ... + 17510.

It is an arithmetic number, because the mean of its divisors is an integer number (10944480).

Almost surely, 2^72923945 is an apocalyptic number.

It is an amenable number.

72923945 is a deficient number, since it is larger than the sum of its proper divisors (14631895).

72923945 is a wasteful number, since it uses less digits than its factorization.

72923945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855.

The product of its digits is 136080, while the sum is 41.

The square root of 72923945 is about 8539.5518032271. The cubic root of 72923945 is about 417.7887278145.

The spelling of 72923945 in words is "seventy-two million, nine hundred twenty-three thousand, nine hundred forty-five".