1904729 has 2 divisors, whose sum is σ = 1904730. Its totient is φ = 1904728.

The previous prime is 1904719. The next prime is 1904741. The reversal of 1904729 is 9274091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1885129 + 19600 = 1373^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1904729 - 2⁸ = 1904473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1904695 and 1904704.

It is not a weakly prime, because it can be changed into another prime (1904719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952364 + 952365.

It is an arithmetic number, because the mean of its divisors is an integer number (952365).

2^1904729 is an apocalyptic number.

It is an amenable number.

1904729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1904729 is an equidigital number, since it uses as much as digits as its factorization.

1904729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1904729 is about 1380.1191977507. The cubic root of 1904729 is about 123.9589050433.

The spelling of 1904729 in words is "one million, nine hundred four thousand, seven hundred twenty-nine".