121867477 has 2 divisors, whose sum is σ = 121867478. Its totient is φ = 121867476.

The previous prime is 121867429. The next prime is 121867507. The reversal of 121867477 is 774768121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69072721 + 52794756 = 8311^2 + 7266^2 .

It is an emirp because it is prime and its reverse (774768121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121867477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121867177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60933738 + 60933739.

It is an arithmetic number, because the mean of its divisors is an integer number (60933739).

Almost surely, 2^121867477 is an apocalyptic number.

It is an amenable number.

121867477 is a deficient number, since it is larger than the sum of its proper divisors (1).

121867477 is an equidigital number, since it uses as much as digits as its factorization.

121867477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131712, while the sum is 43.

The square root of 121867477 is about 11039.3603528465. The cubic root of 121867477 is about 495.7879190538.

The spelling of 121867477 in words is "one hundred twenty-one million, eight hundred sixty-seven thousand, four hundred seventy-seven".