108315987 has 12 divisors (see below), whose sum is σ = 156385944. Its totient is φ = 66655680.

The previous prime is 108315971. The next prime is 108316003. The reversal of 108315987 is 789513801.

It is an interprime number because it is at equal distance from previous prime (108315971) and next prime (108316003).

It is not a de Polignac number, because 108315987 - 2⁴ = 108315971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108310987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106314 + ... + 107327.

It is an arithmetic number, because the mean of its divisors is an integer number (13032162).

Almost surely, 2^108315987 is an apocalyptic number.

108315987 is a deficient number, since it is larger than the sum of its proper divisors (48069957).

108315987 is a wasteful number, since it uses less digits than its factorization.

108315987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213670 (or 213657 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 108315987 is about 10407.4966730718. The cubic root of 108315987 is about 476.6843060506.

It can be divided in two parts, 1083 and 15987, that multiplied together give a square (17313921 = 4161²).

The spelling of 108315987 in words is "one hundred eight million, three hundred fifteen thousand, nine hundred eighty-seven".