107143987 has 4 divisors (see below), whose sum is σ = 108500320. Its totient is φ = 105787656.

The previous prime is 107143961. The next prime is 107144033. The reversal of 107143987 is 789341701.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-107143987 is a prime.

It is a super-2 number, since 2×107143987² = 22959667900512338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107143937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678048 + ... + 678205.

It is an arithmetic number, because the mean of its divisors is an integer number (27125080).

Almost surely, 2^107143987 is an apocalyptic number.

107143987 is a deficient number, since it is larger than the sum of its proper divisors (1356333).

107143987 is an equidigital number, since it uses as much as digits as its factorization.

107143987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356332.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 107143987 is about 10351.0379672765. The cubic root of 107143987 is about 474.9587953177.

The spelling of 107143987 in words is "one hundred seven million, one hundred forty-three thousand, nine hundred eighty-seven".