121877477 has 2 divisors, whose sum is σ = 121877478. Its totient is φ = 121877476.

The previous prime is 121877473. The next prime is 121877491. The reversal of 121877477 is 774778121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121859521 + 17956 = 11039^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 121877477 - 2² = 121877473 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121877473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60938738 + 60938739.

It is an arithmetic number, because the mean of its divisors is an integer number (60938739).

Almost surely, 2^121877477 is an apocalyptic number.

It is an amenable number.

121877477 is a deficient number, since it is larger than the sum of its proper divisors (1).

121877477 is an equidigital number, since it uses as much as digits as its factorization.

121877477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153664, while the sum is 44.

The square root of 121877477 is about 11039.8132683483. The cubic root of 121877477 is about 495.8014795314.

The spelling of 121877477 in words is "one hundred twenty-one million, eight hundred seventy-seven thousand, four hundred seventy-seven".