72672139 has 2 divisors, whose sum is σ = 72672140. Its totient is φ = 72672138.

The previous prime is 72672137. The next prime is 72672143. The reversal of 72672139 is 93127627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72672139 - 2¹ = 72672137 is a prime.

Together with 72672137, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72672098 and 72672107.

It is not a weakly prime, because it can be changed into another prime (72672137) 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, 36336069 + 36336070.

It is an arithmetic number, because the mean of its divisors is an integer number (36336070).

Almost surely, 2^72672139 is an apocalyptic number.

72672139 is a deficient number, since it is larger than the sum of its proper divisors (1).

72672139 is an equidigital number, since it uses as much as digits as its factorization.

72672139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 72672139 is about 8524.7955400702. The cubic root of 72672139 is about 417.3072991690.

The spelling of 72672139 in words is "seventy-two million, six hundred seventy-two thousand, one hundred thirty-nine".