121373977 has 2 divisors, whose sum is σ = 121373978. Its totient is φ = 121373976.

The previous prime is 121373963. The next prime is 121373983. The reversal of 121373977 is 779373121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108493056 + 12880921 = 10416^2 + 3589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121373977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121373927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60686988 + 60686989.

It is an arithmetic number, because the mean of its divisors is an integer number (60686989).

Almost surely, 2^121373977 is an apocalyptic number.

It is an amenable number.

121373977 is a deficient number, since it is larger than the sum of its proper divisors (1).

121373977 is an equidigital number, since it uses as much as digits as its factorization.

121373977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55566, while the sum is 40.

The square root of 121373977 is about 11016.9858400563. The cubic root of 121373977 is about 495.1177857990.

The spelling of 121373977 in words is "one hundred twenty-one million, three hundred seventy-three thousand, nine hundred seventy-seven".