68372409 has 16 divisors (see below), whose sum is σ = 104389632. Its totient is φ = 38993808.

The previous prime is 68372389. The next prime is 68372413. The reversal of 68372409 is 90427386.

It is not a de Polignac number, because 68372409 - 2⁷ = 68372281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68372449) 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 15 ways as a sum of consecutive naturals, for example, 8932 + ... + 14714.

It is an arithmetic number, because the mean of its divisors is an integer number (6524352).

Almost surely, 2^68372409 is an apocalyptic number.

It is an amenable number.

68372409 is a deficient number, since it is larger than the sum of its proper divisors (36017223).

68372409 is a wasteful number, since it uses less digits than its factorization.

68372409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 68372409 is about 8268.7610317387. The cubic root of 68372409 is about 408.9092742174.

The spelling of 68372409 in words is "sixty-eight million, three hundred seventy-two thousand, four hundred nine".