72700123 has 2 divisors, whose sum is σ = 72700124. Its totient is φ = 72700122.

The previous prime is 72700091. The next prime is 72700157. The reversal of 72700123 is 32100727.

It is a weak prime.

It is an emirp because it is prime and its reverse (32100727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72700123 - 2⁵ = 72700091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72700094 and 72700103.

It is not a weakly prime, because it can be changed into another prime (72700163) 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 as a sum of consecutive naturals, namely, 36350061 + 36350062.

It is an arithmetic number, because the mean of its divisors is an integer number (36350062).

Almost surely, 2^72700123 is an apocalyptic number.

72700123 is a deficient number, since it is larger than the sum of its proper divisors (1).

72700123 is an equidigital number, since it uses as much as digits as its factorization.

72700123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 72700123 is about 8526.4367117806. The cubic root of 72700123 is about 417.3608567358.

The spelling of 72700123 in words is "seventy-two million, seven hundred thousand, one hundred twenty-three".