72437739 has 24 divisors (see below), whose sum is σ = 106638336. Its totient is φ = 43705200.

The previous prime is 72437713. The next prime is 72437779. The reversal of 72437739 is 93773427.

It is not a de Polignac number, because 72437739 - 2⁹ = 72437227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72437739.

It is not an unprimeable number, because it can be changed into a prime (72437779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156222 + ... + 156684.

It is an arithmetic number, because the mean of its divisors is an integer number (4443264).

Almost surely, 2^72437739 is an apocalyptic number.

72437739 is a deficient number, since it is larger than the sum of its proper divisors (34200597).

72437739 is a wasteful number, since it uses less digits than its factorization.

72437739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919 (or 908 counting only the distinct ones).

The product of its digits is 222264, while the sum is 42.

The square root of 72437739 is about 8511.0363058796. The cubic root of 72437739 is about 416.8581486475.

The spelling of 72437739 in words is "seventy-two million, four hundred thirty-seven thousand, seven hundred thirty-nine".