121613791 has 8 divisors (see below), whose sum is σ = 135485280. Its totient is φ = 108387552.

The previous prime is 121613743. The next prime is 121613819. The reversal of 121613791 is 197316121.

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

It is not a de Polignac number, because 121613791 - 2¹⁵ = 121581023 is a prime.

It is a super-2 number, since 2×121613791² = 29579828322783362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121613731) 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, 160915 + ... + 161668.

It is an arithmetic number, because the mean of its divisors is an integer number (16935660).

Almost surely, 2^121613791 is an apocalyptic number.

121613791 is a deficient number, since it is larger than the sum of its proper divisors (13871489).

121613791 is a wasteful number, since it uses less digits than its factorization.

121613791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322625.

The product of its digits is 2268, while the sum is 31.

The square root of 121613791 is about 11027.8642991288. The cubic root of 121613791 is about 495.4436603251.

The spelling of 121613791 in words is "one hundred twenty-one million, six hundred thirteen thousand, seven hundred ninety-one".