102617987 has 2 divisors, whose sum is σ = 102617988. Its totient is φ = 102617986.

The previous prime is 102617981. The next prime is 102618013. The reversal of 102617987 is 789716201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102617987 - 2⁶ = 102617923 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102617981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51308993 + 51308994.

It is an arithmetic number, because the mean of its divisors is an integer number (51308994).

Almost surely, 2^102617987 is an apocalyptic number.

102617987 is a deficient number, since it is larger than the sum of its proper divisors (1).

102617987 is an equidigital number, since it uses as much as digits as its factorization.

102617987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 102617987 is about 10130.0536523752. The cubic root of 102617987 is about 468.1745808723.

The spelling of 102617987 in words is "one hundred two million, six hundred seventeen thousand, nine hundred eighty-seven".