1900131 has 4 divisors (see below), whose sum is σ = 2533512. Its totient is φ = 1266752.

The previous prime is 1900121. The next prime is 1900147. The reversal of 1900131 is 1310091.

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-1900131 is a prime.

It is a super-2 number, since 2×1900131² = 7220995634322, which contains 22 as substring.

It is a D-number.

It is a nialpdrome in base 12.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1900131.

It is not an unprimeable number, because it can be changed into a prime (1900111) 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, 316686 + ... + 316691.

It is an arithmetic number, because the mean of its divisors is an integer number (633378).

2^1900131 is an apocalyptic number.

1900131 is a deficient number, since it is larger than the sum of its proper divisors (633381).

1900131 is an equidigital number, since it uses as much as digits as its factorization.

1900131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633380.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 1900131 is about 1378.4523930844. The cubic root of 1900131 is about 123.8590794180.

The spelling of 1900131 in words is "one million, nine hundred thousand, one hundred thirty-one".