72679909 has 8 divisors (see below), whose sum is σ = 73206720. Its totient is φ = 72155616.

The previous prime is 72679897. The next prime is 72679927. The reversal of 72679909 is 90997627.

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 72679909 - 2⁷ = 72679781 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 (72679969) 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, 158809 + ... + 159265.

It is an arithmetic number, because the mean of its divisors is an integer number (9150840).

Almost surely, 2^72679909 is an apocalyptic number.

It is an amenable number.

72679909 is a deficient number, since it is larger than the sum of its proper divisors (526811).

72679909 is a wasteful number, since it uses less digits than its factorization.

72679909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 72679909 is about 8525.2512572944. The cubic root of 72679909 is about 417.3221712699.

The spelling of 72679909 in words is "seventy-two million, six hundred seventy-nine thousand, nine hundred nine".