72990191 has 8 divisors (see below), whose sum is σ = 77122800. Its totient is φ = 68886720.

The previous prime is 72990173. The next prime is 72990199. The reversal of 72990191 is 19109927.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72990191 - 2¹⁴ = 72973807 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72990199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030 + ... + 12251.

It is an arithmetic number, because the mean of its divisors is an integer number (9640350).

Almost surely, 2^72990191 is an apocalyptic number.

72990191 is a deficient number, since it is larger than the sum of its proper divisors (4132609).

72990191 is a wasteful number, since it uses less digits than its factorization.

72990191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14569.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 72990191 is about 8543.4296977268. The cubic root of 72990191 is about 417.9151995584.

The spelling of 72990191 in words is "seventy-two million, nine hundred ninety thousand, one hundred ninety-one".