121595987 has 2 divisors, whose sum is σ = 121595988. Its totient is φ = 121595986.

The previous prime is 121595911. The next prime is 121595993. The reversal of 121595987 is 789595121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121595987 - 2¹⁴ = 121579603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121598987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60797993 + 60797994.

It is an arithmetic number, because the mean of its divisors is an integer number (60797994).

Almost surely, 2^121595987 is an apocalyptic number.

121595987 is a deficient number, since it is larger than the sum of its proper divisors (1).

121595987 is an equidigital number, since it uses as much as digits as its factorization.

121595987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 47.

The square root of 121595987 is about 11027.0570416589. The cubic root of 121595987 is about 495.4194818462.

The spelling of 121595987 in words is "one hundred twenty-one million, five hundred ninety-five thousand, nine hundred eighty-seven".