72163975 has 12 divisors (see below), whose sum is σ = 96367096. Its totient is φ = 53290080.

The previous prime is 72163969. The next prime is 72163979. The reversal of 72163975 is 57936127.

It is not a de Polignac number, because 72163975 - 2¹⁷ = 72032903 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 (72163979) 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 11 ways as a sum of consecutive naturals, for example, 110697 + ... + 111346.

Almost surely, 2^72163975 is an apocalyptic number.

72163975 is a deficient number, since it is larger than the sum of its proper divisors (24203121).

72163975 is a wasteful number, since it uses less digits than its factorization.

72163975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222066 (or 222061 counting only the distinct ones).

The product of its digits is 79380, while the sum is 40.

The square root of 72163975 is about 8494.9381987158. The cubic root of 72163975 is about 416.3323415937.

The spelling of 72163975 in words is "seventy-two million, one hundred sixty-three thousand, nine hundred seventy-five".