121863877 has 2 divisors, whose sum is σ = 121863878. Its totient is φ = 121863876.

The previous prime is 121863869. The next prime is 121863881. The reversal of 121863877 is 778368121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121859521 + 4356 = 11039^2 + 66^2 .

It is a cyclic number.

It is not a de Polignac number, because 121863877 - 2³ = 121863869 is a prime.

It is a super-2 number, since 2×121863877² = 29701609034942258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121863817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60931938 + 60931939.

It is an arithmetic number, because the mean of its divisors is an integer number (60931939).

Almost surely, 2^121863877 is an apocalyptic number.

It is an amenable number.

121863877 is a deficient number, since it is larger than the sum of its proper divisors (1).

121863877 is an equidigital number, since it uses as much as digits as its factorization.

121863877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 43.

The square root of 121863877 is about 11039.1972987170. The cubic root of 121863877 is about 495.7830371002.

The spelling of 121863877 in words is "one hundred twenty-one million, eight hundred sixty-three thousand, eight hundred seventy-seven".