72329839 has 2 divisors, whose sum is σ = 72329840. Its totient is φ = 72329838.

The previous prime is 72329821. The next prime is 72329843. The reversal of 72329839 is 93892327.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72329839 - 2⁷ = 72329711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72329795 and 72329804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72329819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36164919 + 36164920.

It is an arithmetic number, because the mean of its divisors is an integer number (36164920).

Almost surely, 2^72329839 is an apocalyptic number.

72329839 is a deficient number, since it is larger than the sum of its proper divisors (1).

72329839 is an equidigital number, since it uses as much as digits as its factorization.

72329839 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 72329839 is about 8504.6951150526. The cubic root of 72329839 is about 416.6510680738.

It can be divided in two parts, 7232 and 9839, that added together give a palindrome (17071).

The spelling of 72329839 in words is "seventy-two million, three hundred twenty-nine thousand, eight hundred thirty-nine".