72984691 has 8 divisors (see below), whose sum is σ = 78702624. Its totient is φ = 67281600.

The previous prime is 72984679. The next prime is 72984701. The reversal of 72984691 is 19648927.

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 72984691 - 2⁷ = 72984563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72984671) 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, 7866 + ... + 14416.

It is an arithmetic number, because the mean of its divisors is an integer number (9837828).

Almost surely, 2^72984691 is an apocalyptic number.

72984691 is a deficient number, since it is larger than the sum of its proper divisors (5717933).

72984691 is a wasteful number, since it uses less digits than its factorization.

72984691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7421.

The product of its digits is 217728, while the sum is 46.

The square root of 72984691 is about 8543.1078068815. The cubic root of 72984691 is about 417.9047022971.

The spelling of 72984691 in words is "seventy-two million, nine hundred eighty-four thousand, six hundred ninety-one".