72432439 has 2 divisors, whose sum is σ = 72432440. Its totient is φ = 72432438.

The previous prime is 72432403. The next prime is 72432533. The reversal of 72432439 is 93423427.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72432439 - 2²³ = 64043831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72432839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36216219 + 36216220.

It is an arithmetic number, because the mean of its divisors is an integer number (36216220).

Almost surely, 2^72432439 is an apocalyptic number.

72432439 is a deficient number, since it is larger than the sum of its proper divisors (1).

72432439 is an equidigital number, since it uses as much as digits as its factorization.

72432439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 34.

The square root of 72432439 is about 8510.7249397451. The cubic root of 72432439 is about 416.8479817460.

The spelling of 72432439 in words is "seventy-two million, four hundred thirty-two thousand, four hundred thirty-nine".