72307783 has 8 divisors (see below), whose sum is σ = 77423040. Its totient is φ = 67288320.

The previous prime is 72307771. The next prime is 72307799. The reversal of 72307783 is 38770327.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72307783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72307733) by changing a digit.

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, 22383 + ... + 25408.

It is an arithmetic number, because the mean of its divisors is an integer number (9677880).

Almost surely, 2^72307783 is an apocalyptic number.

72307783 is a deficient number, since it is larger than the sum of its proper divisors (5115257).

72307783 is a wasteful number, since it uses less digits than its factorization.

72307783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47897.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 72307783 is about 8503.3983206716. The cubic root of 72307783 is about 416.6087130775.

The spelling of 72307783 in words is "seventy-two million, three hundred seven thousand, seven hundred eighty-three".