121391759 has 2 divisors, whose sum is σ = 121391760. Its totient is φ = 121391758.

The previous prime is 121391737. The next prime is 121391771. The reversal of 121391759 is 957193121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121391759 - 2²⁰ = 120343183 is a prime.

It is a super-2 number, since 2×121391759² = 29471918306228162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121391059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60695879 + 60695880.

It is an arithmetic number, because the mean of its divisors is an integer number (60695880).

Almost surely, 2^121391759 is an apocalyptic number.

121391759 is a deficient number, since it is larger than the sum of its proper divisors (1).

121391759 is an equidigital number, since it uses as much as digits as its factorization.

121391759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 38.

The square root of 121391759 is about 11017.7928370432. The cubic root of 121391759 is about 495.1419638389.

The spelling of 121391759 in words is "one hundred twenty-one million, three hundred ninety-one thousand, seven hundred fifty-nine".