1904869 has 2 divisors, whose sum is σ = 1904870. Its totient is φ = 1904868.

The previous prime is 1904849. The next prime is 1904879. The reversal of 1904869 is 9684091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1822500 + 82369 = 1350^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1904869 - 2⁷ = 1904741 is a prime.

It is a super-2 number, since 2×1904869² = 7257051814322, which contains 22 as substring.

1904869 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1904809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952434 + 952435.

It is an arithmetic number, because the mean of its divisors is an integer number (952435).

2^1904869 is an apocalyptic number.

It is an amenable number.

1904869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904869 is an equidigital number, since it uses as much as digits as its factorization.

1904869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1904869 is about 1380.1699170754. The cubic root of 1904869 is about 123.9619420145.

The spelling of 1904869 in words is "one million, nine hundred four thousand, eight hundred sixty-nine".