121937887 has 2 divisors, whose sum is σ = 121937888. Its totient is φ = 121937886.

The previous prime is 121937867. The next prime is 121937891. The reversal of 121937887 is 788739121.

It is a strong prime.

It is an emirp because it is prime and its reverse (788739121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121937887 - 2⁷ = 121937759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121937867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60968943 + 60968944.

It is an arithmetic number, because the mean of its divisors is an integer number (60968944).

Almost surely, 2^121937887 is an apocalyptic number.

121937887 is a deficient number, since it is larger than the sum of its proper divisors (1).

121937887 is an equidigital number, since it uses as much as digits as its factorization.

121937887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 46.

The square root of 121937887 is about 11042.5489358209. The cubic root of 121937887 is about 495.8833826057.

The spelling of 121937887 in words is "one hundred twenty-one million, nine hundred thirty-seven thousand, eight hundred eighty-seven".