1900849 has 4 divisors (see below), whose sum is σ = 1907236. Its totient is φ = 1894464.

The previous prime is 1900831. The next prime is 1900861. The reversal of 1900849 is 9480091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 734449 + 1166400 = 857^2 + 1080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900849 - 2⁷ = 1900721 is a prime.

It is a super-2 number, since 2×1900849² = 7226453841602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1900849.

It is not an unprimeable number, because it can be changed into a prime (1900879) 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, 2724 + ... + 3349.

It is an arithmetic number, because the mean of its divisors is an integer number (476809).

2^1900849 is an apocalyptic number.

It is an amenable number.

1900849 is a deficient number, since it is larger than the sum of its proper divisors (6387).

1900849 is an equidigital number, since it uses as much as digits as its factorization.

1900849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6386.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1900849 is about 1378.7128054820. The cubic root of 1900849 is about 123.8746782759.

The spelling of 1900849 in words is "one million, nine hundred thousand, eight hundred forty-nine".