121979807 has 2 divisors, whose sum is σ = 121979808. Its totient is φ = 121979806.

The previous prime is 121979783. The next prime is 121979831. The reversal of 121979807 is 708979121.

It is a balanced prime because it is at equal distance from previous prime (121979783) and next prime (121979831).

It is a cyclic number.

It is not a de Polignac number, because 121979807 - 2¹⁶ = 121914271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121979857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60989903 + 60989904.

It is an arithmetic number, because the mean of its divisors is an integer number (60989904).

Almost surely, 2^121979807 is an apocalyptic number.

121979807 is a deficient number, since it is larger than the sum of its proper divisors (1).

121979807 is an equidigital number, since it uses as much as digits as its factorization.

121979807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 121979807 is about 11044.4468851998. The cubic root of 121979807 is about 495.9402012868.

The spelling of 121979807 in words is "one hundred twenty-one million, nine hundred seventy-nine thousand, eight hundred seven".