78903409 has 48 divisors (see below), whose sum is σ = 101388672. Its totient is φ = 60673536.

The previous prime is 78903367. The next prime is 78903413. The reversal of 78903409 is 90430987.

It is not a de Polignac number, because 78903409 - 2⁷ = 78903281 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 (78903469) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1834942 + ... + 1834984.

It is an arithmetic number, because the mean of its divisors is an integer number (2112264).

Almost surely, 2^78903409 is an apocalyptic number.

It is an amenable number.

78903409 is a deficient number, since it is larger than the sum of its proper divisors (22485263).

78903409 is a wasteful number, since it uses less digits than its factorization.

78903409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 78903409 is about 8882.7590871305. The cubic root of 78903409 is about 428.9090951933.

The spelling of 78903409 in words is "seventy-eight million, nine hundred three thousand, four hundred nine".