1904090369 has 2 divisors, whose sum is σ = 1904090370. Its totient is φ = 1904090368.

The previous prime is 1904090261. The next prime is 1904090387. The reversal of 1904090369 is 9630904091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1222201600 + 681888769 = 34960^2 + 26113^2 .

It is a cyclic number.

It is not a de Polignac number, because 1904090369 - 2¹⁶ = 1904024833 is a prime.

It is a super-2 number, since 2×1904090369² = 7251120266637112322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1904090399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952045184 + 952045185.

It is an arithmetic number, because the mean of its divisors is an integer number (952045185).

Almost surely, 2^1904090369 is an apocalyptic number.

It is an amenable number.

1904090369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904090369 is an equidigital number, since it uses as much as digits as its factorization.

1904090369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1904090369 is about 43635.8839603370. The cubic root of 1904090369 is about 1239.4504955543.

The spelling of 1904090369 in words is "one billion, nine hundred four million, ninety thousand, three hundred sixty-nine".