1904090343 has 4 divisors (see below), whose sum is σ = 2538787128. Its totient is φ = 1269393560.

The previous prime is 1904090261. The next prime is 1904090369. The reversal of 1904090343 is 3430904091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3430904091 = 3 ⋅1143634697.

It is a cyclic number.

It is not a de Polignac number, because 1904090343 - 2⁸ = 1904090087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1904090393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317348388 + ... + 317348393.

It is an arithmetic number, because the mean of its divisors is an integer number (634696782).

Almost surely, 2^1904090343 is an apocalyptic number.

1904090343 is a deficient number, since it is larger than the sum of its proper divisors (634696785).

1904090343 is an equidigital number, since it uses as much as digits as its factorization.

1904090343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634696784.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 1904090343 is about 43635.8836624171. The cubic root of 1904090343 is about 1239.4504899128.

The spelling of 1904090343 in words is "one billion, nine hundred four million, ninety thousand, three hundred forty-three".