72649459 has 4 divisors (see below), whose sum is σ = 72908280. Its totient is φ = 72390640.

The previous prime is 72649457. The next prime is 72649471. The reversal of 72649459 is 95494627.

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 72649459 - 2¹ = 72649457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72649453) 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 3 ways as a sum of consecutive naturals, for example, 128989 + ... + 129550.

It is an arithmetic number, because the mean of its divisors is an integer number (18227070).

Almost surely, 2^72649459 is an apocalyptic number.

72649459 is a deficient number, since it is larger than the sum of its proper divisors (258821).

72649459 is a wasteful number, since it uses less digits than its factorization.

72649459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258820.

The product of its digits is 544320, while the sum is 46.

The square root of 72649459 is about 8523.4651990842. The cubic root of 72649459 is about 417.2638826482.

The spelling of 72649459 in words is "seventy-two million, six hundred forty-nine thousand, four hundred fifty-nine".