72331773 has 8 divisors (see below), whose sum is σ = 99553536. Its totient is φ = 46665600.

The previous prime is 72331769. The next prime is 72331783. The reversal of 72331773 is 37713327.

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

It is not a de Polignac number, because 72331773 - 2² = 72331769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72331703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388788 + ... + 388973.

It is an arithmetic number, because the mean of its divisors is an integer number (12444192).

Almost surely, 2^72331773 is an apocalyptic number.

It is an amenable number.

72331773 is a deficient number, since it is larger than the sum of its proper divisors (27221763).

72331773 is a wasteful number, since it uses less digits than its factorization.

72331773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777795.

The product of its digits is 18522, while the sum is 33.

The square root of 72331773 is about 8504.8088161933. The cubic root of 72331773 is about 416.6547815988.

The spelling of 72331773 in words is "seventy-two million, three hundred thirty-one thousand, seven hundred seventy-three".