72116123 has 2 divisors, whose sum is σ = 72116124. Its totient is φ = 72116122.

The previous prime is 72116101. The next prime is 72116129. The reversal of 72116123 is 32161127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72116123 - 2⁶ = 72116059 is a prime.

It is a super-2 number, since 2×72116123² = 10401470393102258, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (72116129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36058061 + 36058062.

It is an arithmetic number, because the mean of its divisors is an integer number (36058062).

Almost surely, 2^72116123 is an apocalyptic number.

72116123 is a deficient number, since it is larger than the sum of its proper divisors (1).

72116123 is an equidigital number, since it uses as much as digits as its factorization.

72116123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 23.

The square root of 72116123 is about 8492.1212308822. The cubic root of 72116123 is about 416.2402977896.

The spelling of 72116123 in words is "seventy-two million, one hundred sixteen thousand, one hundred twenty-three".