72435737 has 4 divisors (see below), whose sum is σ = 79020816. Its totient is φ = 65850660.

The previous prime is 72435719. The next prime is 72435743. The reversal of 72435737 is 73753427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73753427 = 11 ⋅6704857.

It is a cyclic number.

It is not a de Polignac number, because 72435737 - 2⁶ = 72435673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72435737.

It is not an unprimeable number, because it can be changed into a prime (72435767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3292523 + ... + 3292544.

It is an arithmetic number, because the mean of its divisors is an integer number (19755204).

Almost surely, 2^72435737 is an apocalyptic number.

It is an amenable number.

72435737 is a deficient number, since it is larger than the sum of its proper divisors (6585079).

72435737 is a wasteful number, since it uses less digits than its factorization.

72435737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6585078.

The product of its digits is 123480, while the sum is 38.

The square root of 72435737 is about 8510.9186930672. The cubic root of 72435737 is about 416.8543083026.

The spelling of 72435737 in words is "seventy-two million, four hundred thirty-five thousand, seven hundred thirty-seven".