72173963 has 2 divisors, whose sum is σ = 72173964. Its totient is φ = 72173962.

The previous prime is 72173947. The next prime is 72173971. The reversal of 72173963 is 36937127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72173963 - 2⁴ = 72173947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72173903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36086981 + 36086982.

It is an arithmetic number, because the mean of its divisors is an integer number (36086982).

Almost surely, 2^72173963 is an apocalyptic number.

72173963 is a deficient number, since it is larger than the sum of its proper divisors (1).

72173963 is an equidigital number, since it uses as much as digits as its factorization.

72173963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 38.

The square root of 72173963 is about 8495.5260578730. The cubic root of 72173963 is about 416.3515484791.

The spelling of 72173963 in words is "seventy-two million, one hundred seventy-three thousand, nine hundred sixty-three".