103890891 has 12 divisors (see below), whose sum is σ = 149997048. Its totient is φ = 63932544.

The previous prime is 103890883. The next prime is 103890907. The reversal of 103890891 is 198098301.

It is a happy number.

It is not a de Polignac number, because 103890891 - 2³ = 103890883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (103897891) 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, 101950 + ... + 102963.

It is an arithmetic number, because the mean of its divisors is an integer number (12499754).

Almost surely, 2^103890891 is an apocalyptic number.

103890891 is a deficient number, since it is larger than the sum of its proper divisors (46106157).

103890891 is a wasteful number, since it uses less digits than its factorization.

103890891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204942 (or 204929 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 103890891 is about 10192.6881145260. The cubic root of 103890891 is about 470.1024237319.

The spelling of 103890891 in words is "one hundred three million, eight hundred ninety thousand, eight hundred ninety-one".