72386939 has 2 divisors, whose sum is σ = 72386940. Its totient is φ = 72386938.

The previous prime is 72386933. The next prime is 72387013. The reversal of 72386939 is 93968327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72386939 - 2⁸ = 72386683 is a prime.

It is a super-3 number, since 3×72386939³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 72386893 and 72386902.

It is not a weakly prime, because it can be changed into another prime (72386933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36193469 + 36193470.

It is an arithmetic number, because the mean of its divisors is an integer number (36193470).

Almost surely, 2^72386939 is an apocalyptic number.

72386939 is a deficient number, since it is larger than the sum of its proper divisors (1).

72386939 is an equidigital number, since it uses as much as digits as its factorization.

72386939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 47.

The square root of 72386939 is about 8508.0514220355. The cubic root of 72386939 is about 416.7606794440.

The spelling of 72386939 in words is "seventy-two million, three hundred eighty-six thousand, nine hundred thirty-nine".