72409099 has 8 divisors (see below), whose sum is σ = 82945280. Its totient is φ = 61920936.

The previous prime is 72409097. The next prime is 72409153. The reversal of 72409099 is 99090427.

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

It is not a de Polignac number, because 72409099 - 2¹ = 72409097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72409091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8709 + ... + 14854.

It is an arithmetic number, because the mean of its divisors is an integer number (10368160).

Almost surely, 2^72409099 is an apocalyptic number.

72409099 is a deficient number, since it is larger than the sum of its proper divisors (10536181).

72409099 is a wasteful number, since it uses less digits than its factorization.

72409099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24009.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 72409099 is about 8509.3536182251. The cubic root of 72409099 is about 416.8032031116.

The spelling of 72409099 in words is "seventy-two million, four hundred nine thousand, ninety-nine".