1900087 has 6 divisors (see below), whose sum is σ = 2175704. Its totient is φ = 1625520.

The previous prime is 1900079. The next prime is 1900111. The reversal of 1900087 is 7800091.

It is not a de Polignac number, because 1900087 - 2³ = 1900079 is a prime.

It is a super-2 number, since 2×1900087² = 7220661215138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3387 + ... + 3907.

2^1900087 is an apocalyptic number.

1900087 is a deficient number, since it is larger than the sum of its proper divisors (275617).

1900087 is an frugal number, since it uses more digits than its factorization.

1900087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 1900087 is about 1378.4364330647. The cubic root of 1900087 is about 123.8581233714.

The spelling of 1900087 in words is "one million, nine hundred thousand, eighty-seven".