121741979 has 2 divisors, whose sum is σ = 121741980. Its totient is φ = 121741978.

The previous prime is 121741973. The next prime is 121741999. The reversal of 121741979 is 979147121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121741979 is a prime.

It is a super-2 number, since 2×121741979² = 29642218901672882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121741973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60870989 + 60870990.

It is an arithmetic number, because the mean of its divisors is an integer number (60870990).

Almost surely, 2^121741979 is an apocalyptic number.

121741979 is a deficient number, since it is larger than the sum of its proper divisors (1).

121741979 is an equidigital number, since it uses as much as digits as its factorization.

121741979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 41.

The square root of 121741979 is about 11033.6747731660. The cubic root of 121741979 is about 495.6176746647.

The spelling of 121741979 in words is "one hundred twenty-one million, seven hundred forty-one thousand, nine hundred seventy-nine".