72949989 has 8 divisors (see below), whose sum is σ = 111161920. Its totient is φ = 41685696.

The previous prime is 72949979. The next prime is 72949991. The reversal of 72949989 is 98994927.

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

It is not a de Polignac number, because 72949989 - 2⁷ = 72949861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72949909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1736884 + ... + 1736925.

It is an arithmetic number, because the mean of its divisors is an integer number (13895240).

Almost surely, 2^72949989 is an apocalyptic number.

It is an amenable number.

72949989 is a deficient number, since it is larger than the sum of its proper divisors (38211931).

72949989 is a wasteful number, since it uses less digits than its factorization.

72949989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473819.

The product of its digits is 2939328, while the sum is 57.

The square root of 72949989 is about 8541.0765714868. The cubic root of 72949989 is about 417.8384581399.

The spelling of 72949989 in words is "seventy-two million, nine hundred forty-nine thousand, nine hundred eighty-nine".