72550807 has 4 divisors (see below), whose sum is σ = 82915216. Its totient is φ = 62186400.

The previous prime is 72550783. The next prime is 72550867. The reversal of 72550807 is 70805527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72550807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72550867) 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, 5182194 + ... + 5182207.

It is an arithmetic number, because the mean of its divisors is an integer number (20728804).

Almost surely, 2^72550807 is an apocalyptic number.

72550807 is a deficient number, since it is larger than the sum of its proper divisors (10364409).

72550807 is a wasteful number, since it uses less digits than its factorization.

72550807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10364408.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 72550807 is about 8517.6761502184. The cubic root of 72550807 is about 417.0749270634.

The spelling of 72550807 in words is "seventy-two million, five hundred fifty thousand, eight hundred seven".