968971987 has 2 divisors, whose sum is σ = 968971988. Its totient is φ = 968971986.

The previous prime is 968971957. The next prime is 968972009. The reversal of 968971987 is 789179869.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 968971987 - 2²⁷ = 834754259 is a prime.

It is not a weakly prime, because it can be changed into another prime (968971957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484485993 + 484485994.

It is an arithmetic number, because the mean of its divisors is an integer number (484485994).

Almost surely, 2^968971987 is an apocalyptic number.

968971987 is a deficient number, since it is larger than the sum of its proper divisors (1).

968971987 is an equidigital number, since it uses as much as digits as its factorization.

968971987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 64.

The square root of 968971987 is about 31128.3148756883. The cubic root of 968971987 is about 989.5484751843.

The spelling of 968971987 in words is "nine hundred sixty-eight million, nine hundred seventy-one thousand, nine hundred eighty-seven".