72540937 has 4 divisors (see below), whose sum is σ = 82903936. Its totient is φ = 62177940.

The previous prime is 72540929. The next prime is 72540947. The reversal of 72540937 is 73904527.

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: 73904527 = 31 ⋅2384017.

It is a cyclic number.

It is not a de Polignac number, because 72540937 - 2³ = 72540929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72540896 and 72540905.

It is not an unprimeable number, because it can be changed into a prime (72540907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5181489 + ... + 5181502.

It is an arithmetic number, because the mean of its divisors is an integer number (20725984).

Almost surely, 2^72540937 is an apocalyptic number.

It is an amenable number.

72540937 is a deficient number, since it is larger than the sum of its proper divisors (10362999).

72540937 is a wasteful number, since it uses less digits than its factorization.

72540937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10362998.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 72540937 is about 8517.0967471316. The cubic root of 72540937 is about 417.0560128873.

The spelling of 72540937 in words is "seventy-two million, five hundred forty thousand, nine hundred thirty-seven".