72549907 has 4 divisors (see below), whose sum is σ = 72567576. Its totient is φ = 72532240.

The previous prime is 72549899. The next prime is 72549937. The reversal of 72549907 is 70994527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70994527 = 37 ⋅1918771.

It is a cyclic number.

It is not a de Polignac number, because 72549907 - 2³ = 72549899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72549937) 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, 903 + ... + 12079.

It is an arithmetic number, because the mean of its divisors is an integer number (18141894).

Almost surely, 2^72549907 is an apocalyptic number.

72549907 is a deficient number, since it is larger than the sum of its proper divisors (17669).

72549907 is a wasteful number, since it uses less digits than its factorization.

72549907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17668.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 72549907 is about 8517.6233187433. The cubic root of 72549907 is about 417.0732024376.

It can be divided in two parts, 7254 and 9907, that added together give a square (17161 = 131²).

The spelling of 72549907 in words is "seventy-two million, five hundred forty-nine thousand, nine hundred seven".