102971987 has 4 divisors (see below), whose sum is σ = 106293696. Its totient is φ = 99650280.

The previous prime is 102971983. The next prime is 102972007. The reversal of 102971987 is 789179201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102971987 - 2² = 102971983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102971983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1660808 + ... + 1660869.

It is an arithmetic number, because the mean of its divisors is an integer number (26573424).

Almost surely, 2^102971987 is an apocalyptic number.

102971987 is a deficient number, since it is larger than the sum of its proper divisors (3321709).

102971987 is an equidigital number, since it uses as much as digits as its factorization.

102971987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321708.

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 102971987 is about 10147.5113697891. The cubic root of 102971987 is about 468.7123150267.

The spelling of 102971987 in words is "one hundred two million, nine hundred seventy-one thousand, nine hundred eighty-seven".