72238939 has 2 divisors, whose sum is σ = 72238940. Its totient is φ = 72238938.

The previous prime is 72238919. The next prime is 72238961. The reversal of 72238939 is 93983227.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72238939 - 2⁷ = 72238811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72238895 and 72238904.

It is not a weakly prime, because it can be changed into another prime (72238919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36119469 + 36119470.

It is an arithmetic number, because the mean of its divisors is an integer number (36119470).

Almost surely, 2^72238939 is an apocalyptic number.

72238939 is a deficient number, since it is larger than the sum of its proper divisors (1).

72238939 is an equidigital number, since it uses as much as digits as its factorization.

72238939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 72238939 is about 8499.3493280368. The cubic root of 72238939 is about 416.4764538368.

The spelling of 72238939 in words is "seventy-two million, two hundred thirty-eight thousand, nine hundred thirty-nine".