72390707 has 4 divisors (see below), whose sum is σ = 74156376. Its totient is φ = 70625040.

The previous prime is 72390701. The next prime is 72390727. The reversal of 72390707 is 70709327.

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 72390707 - 2¹⁶ = 72325171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72390701) 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, 882773 + ... + 882854.

It is an arithmetic number, because the mean of its divisors is an integer number (18539094).

Almost surely, 2^72390707 is an apocalyptic number.

72390707 is a deficient number, since it is larger than the sum of its proper divisors (1765669).

72390707 is a wasteful number, since it uses less digits than its factorization.

72390707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765668.

The product of its (nonzero) digits is 18522, while the sum is 35.

The square root of 72390707 is about 8508.2728564615. The cubic root of 72390707 is about 416.7679106150.

The spelling of 72390707 in words is "seventy-two million, three hundred ninety thousand, seven hundred seven".