791609409 has 16 divisors (see below), whose sum is σ = 1183137600. Its totient is φ = 523067328.

The previous prime is 791609393. The next prime is 791609411. The reversal of 791609409 is 904906197.

It is not a de Polignac number, because 791609409 - 2⁴ = 791609393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (791609419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126679 + ... + 132780.

It is an arithmetic number, because the mean of its divisors is an integer number (73946100).

Almost surely, 2^791609409 is an apocalyptic number.

It is an amenable number.

791609409 is a deficient number, since it is larger than the sum of its proper divisors (391528191).

791609409 is a wasteful number, since it uses less digits than its factorization.

791609409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259581 (or 259575 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 791609409 is about 28135.5541797207. The cubic root of 791609409 is about 925.0608809211.

The spelling of 791609409 in words is "seven hundred ninety-one million, six hundred nine thousand, four hundred nine".