72991853 has 8 divisors (see below), whose sum is σ = 80256000. Its totient is φ = 65832480.

The previous prime is 72991843. The next prime is 72991873. The reversal of 72991853 is 35819927.

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 72991853 - 2¹⁰ = 72990829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72991843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24728 + ... + 27521.

It is an arithmetic number, because the mean of its divisors is an integer number (10032000).

Almost surely, 2^72991853 is an apocalyptic number.

It is an amenable number.

72991853 is a deficient number, since it is larger than the sum of its proper divisors (7264147).

72991853 is a wasteful number, since it uses less digits than its factorization.

72991853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52387.

The product of its digits is 136080, while the sum is 44.

The square root of 72991853 is about 8543.5269649016. The cubic root of 72991853 is about 417.9183715362.

The spelling of 72991853 in words is "seventy-two million, nine hundred ninety-one thousand, eight hundred fifty-three".