72049907 has 4 divisors (see below), whose sum is σ = 72107520. Its totient is φ = 71992296.

The previous prime is 72049889. The next prime is 72049909. The reversal of 72049907 is 70994027.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72049907 - 2⁸ = 72049651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72049909) 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, 26888 + ... + 29445.

It is an arithmetic number, because the mean of its divisors is an integer number (18026880).

Almost surely, 2^72049907 is an apocalyptic number.

72049907 is a deficient number, since it is larger than the sum of its proper divisors (57613).

72049907 is a wasteful number, since it uses less digits than its factorization.

72049907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57612.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 72049907 is about 8488.2216629869. The cubic root of 72049907 is about 416.1128634687.

The spelling of 72049907 in words is "seventy-two million, forty-nine thousand, nine hundred seven".