121679407 has 4 divisors (see below), whose sum is σ = 126969840. Its totient is φ = 116388976.

The previous prime is 121679399. The next prime is 121679429. The reversal of 121679407 is 704976121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121679407 - 2³ = 121679399 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 (121679507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2645182 + ... + 2645227.

It is an arithmetic number, because the mean of its divisors is an integer number (31742460).

Almost surely, 2^121679407 is an apocalyptic number.

121679407 is a deficient number, since it is larger than the sum of its proper divisors (5290433).

121679407 is an equidigital number, since it uses as much as digits as its factorization.

121679407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290432.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 121679407 is about 11030.8389073542. The cubic root of 121679407 is about 495.5327488679.

The spelling of 121679407 in words is "one hundred twenty-one million, six hundred seventy-nine thousand, four hundred seven".