121992877 has 2 divisors, whose sum is σ = 121992878. Its totient is φ = 121992876.

The previous prime is 121992847. The next prime is 121992881. The reversal of 121992877 is 778299121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120538441 + 1454436 = 10979^2 + 1206^2 .

It is an emirp because it is prime and its reverse (778299121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121992877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121992847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60996438 + 60996439.

It is an arithmetic number, because the mean of its divisors is an integer number (60996439).

Almost surely, 2^121992877 is an apocalyptic number.

It is an amenable number.

121992877 is a deficient number, since it is larger than the sum of its proper divisors (1).

121992877 is an equidigital number, since it uses as much as digits as its factorization.

121992877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 46.

The square root of 121992877 is about 11045.0385694211. The cubic root of 121992877 is about 495.9579138003.

The spelling of 121992877 in words is "one hundred twenty-one million, nine hundred ninety-two thousand, eight hundred seventy-seven".