121790079 has 18 divisors (see below), whose sum is σ = 177526440. Its totient is φ = 80458056.

The previous prime is 121790077. The next prime is 121790087. The reversal of 121790079 is 970097121.

It is not a de Polignac number, because 121790079 - 2¹ = 121790077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121790077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 144742 + ... + 145580.

It is an arithmetic number, because the mean of its divisors is an integer number (9862580).

Almost surely, 2^121790079 is an apocalyptic number.

121790079 is a deficient number, since it is larger than the sum of its proper divisors (55736361).

121790079 is an equidigital number, since it uses as much as digits as its factorization.

121790079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 121790079 is about 11035.8542487657. The cubic root of 121790079 is about 495.6829385708.

It can be divided in two parts, 121 and 790079, that multiplied together give a palindrome (95599559).

The spelling of 121790079 in words is "one hundred twenty-one million, seven hundred ninety thousand, seventy-nine".