102087889 has 4 divisors (see below), whose sum is σ = 102153024. Its totient is φ = 102022756.

The previous prime is 102087883. The next prime is 102087899. The reversal of 102087889 is 988780201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988780201 = 29 ⋅34095869.

It is a cyclic number.

It is not a de Polignac number, because 102087889 - 2⁵ = 102087857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102087883) 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, 30157 + ... + 33370.

It is an arithmetic number, because the mean of its divisors is an integer number (25538256).

Almost surely, 2^102087889 is an apocalyptic number.

It is an amenable number.

102087889 is a deficient number, since it is larger than the sum of its proper divisors (65135).

102087889 is an equidigital number, since it uses as much as digits as its factorization.

102087889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65134.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 102087889 is about 10103.8551553355. The cubic root of 102087889 is about 467.3670324468.

The spelling of 102087889 in words is "one hundred two million, eighty-seven thousand, eight hundred eighty-nine".