72649423 has 8 divisors (see below), whose sum is σ = 90576000. Its totient is φ = 56609880.

The previous prime is 72649397. The next prime is 72649429. The reversal of 72649423 is 32494627.

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 72649423 - 2⁵ = 72649391 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 (72649429) 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, 471673 + ... + 471826.

It is an arithmetic number, because the mean of its divisors is an integer number (11322000).

Almost surely, 2^72649423 is an apocalyptic number.

72649423 is a deficient number, since it is larger than the sum of its proper divisors (17926577).

72649423 is a wasteful number, since it uses less digits than its factorization.

72649423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943517.

The product of its digits is 72576, while the sum is 37.

The square root of 72649423 is about 8523.4630872668. The cubic root of 72649423 is about 417.2638137259.

The spelling of 72649423 in words is "seventy-two million, six hundred forty-nine thousand, four hundred twenty-three".