72390899 has 4 divisors (see below), whose sum is σ = 82732464. Its totient is φ = 62049336.

The previous prime is 72390883. The next prime is 72390911. The reversal of 72390899 is 99809327.

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 72390899 - 2⁴ = 72390883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72390839) 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, 5170772 + ... + 5170785.

It is an arithmetic number, because the mean of its divisors is an integer number (20683116).

Almost surely, 2^72390899 is an apocalyptic number.

72390899 is a deficient number, since it is larger than the sum of its proper divisors (10341565).

72390899 is a wasteful number, since it uses less digits than its factorization.

72390899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10341564.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 72390899 is about 8508.2841395901. The cubic root of 72390899 is about 416.7682790756.

The spelling of 72390899 in words is "seventy-two million, three hundred ninety thousand, eight hundred ninety-nine".