72162919 has 2 divisors, whose sum is σ = 72162920. Its totient is φ = 72162918.

The previous prime is 72162899. The next prime is 72162929. The reversal of 72162919 is 91926127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72162919 - 2⁵ = 72162887 is a prime.

It is a super-2 number, since 2×72162919² = 10414973757201122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72162929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36081459 + 36081460.

It is an arithmetic number, because the mean of its divisors is an integer number (36081460).

Almost surely, 2^72162919 is an apocalyptic number.

72162919 is a deficient number, since it is larger than the sum of its proper divisors (1).

72162919 is an equidigital number, since it uses as much as digits as its factorization.

72162919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 37.

The square root of 72162919 is about 8494.8760438278. The cubic root of 72162919 is about 416.3303108062.

The spelling of 72162919 in words is "seventy-two million, one hundred sixty-two thousand, nine hundred nineteen".