72161883 has 6 divisors (see below), whose sum is σ = 104233844. Its totient is φ = 48107916.

The previous prime is 72161849. The next prime is 72161891. The reversal of 72161883 is 38816127.

It is not a de Polignac number, because 72161883 - 2⁹ = 72161371 is a prime.

It is a super-4 number, since 4×72161883⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72161813) 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 5 ways as a sum of consecutive naturals, for example, 4008985 + ... + 4009002.

Almost surely, 2^72161883 is an apocalyptic number.

72161883 is a deficient number, since it is larger than the sum of its proper divisors (32071961).

72161883 is a wasteful number, since it uses less digits than its factorization.

72161883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8017993 (or 8017990 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 72161883 is about 8494.8150656739. The cubic root of 72161883 is about 416.3283184613.

The spelling of 72161883 in words is "seventy-two million, one hundred sixty-one thousand, eight hundred eighty-three".