1898091 has 12 divisors (see below), whose sum is σ = 2952768. Its totient is φ = 1167984.

The previous prime is 1898087. The next prime is 1898107. The reversal of 1898091 is 1908981.

It is not a de Polignac number, because 1898091 - 2² = 1898087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1898011) 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, 7995 + ... + 8228.

It is an arithmetic number, because the mean of its divisors is an integer number (246064).

2^1898091 is an apocalyptic number.

1898091 is a deficient number, since it is larger than the sum of its proper divisors (1054677).

1898091 is a wasteful number, since it uses less digits than its factorization.

1898091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16242 (or 16239 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1898091 is about 1377.7122341041. The cubic root of 1898091 is about 123.8147380893.

The spelling of 1898091 in words is "one million, eight hundred ninety-eight thousand, ninety-one".