121597079 has 4 divisors (see below), whose sum is σ = 121980984. Its totient is φ = 121213176.

The previous prime is 121597043. The next prime is 121597081. The reversal of 121597079 is 970795121.

It is a happy number.

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 121597079 - 2⁸ = 121596823 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 (121597019) 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, 191477 + ... + 192110.

It is an arithmetic number, because the mean of its divisors is an integer number (30495246).

Almost surely, 2^121597079 is an apocalyptic number.

121597079 is a deficient number, since it is larger than the sum of its proper divisors (383905).

121597079 is an equidigital number, since it uses as much as digits as its factorization.

121597079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383904.

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 121597079 is about 11027.1065561189. The cubic root of 121597079 is about 495.4209648899.

The spelling of 121597079 in words is "one hundred twenty-one million, five hundred ninety-seven thousand, seventy-nine".