72996851 has 4 divisors (see below), whose sum is σ = 74777304. Its totient is φ = 71216400.

The previous prime is 72996839. The next prime is 72996853. The reversal of 72996851 is 15869927.

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 72996851 - 2¹⁰ = 72995827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72996796 and 72996805.

It is not an unprimeable number, because it can be changed into a prime (72996853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890165 + ... + 890246.

It is an arithmetic number, because the mean of its divisors is an integer number (18694326).

Almost surely, 2^72996851 is an apocalyptic number.

72996851 is a deficient number, since it is larger than the sum of its proper divisors (1780453).

72996851 is a wasteful number, since it uses less digits than its factorization.

72996851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780452.

The product of its digits is 272160, while the sum is 47.

The square root of 72996851 is about 8543.8194620439. The cubic root of 72996851 is about 417.9279100818.

The spelling of 72996851 in words is "seventy-two million, nine hundred ninety-six thousand, eight hundred fifty-one".