1890769 has 2 divisors, whose sum is σ = 1890770. Its totient is φ = 1890768.

The previous prime is 1890743. The next prime is 1890793. The reversal of 1890769 is 9670981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1890625 + 144 = 1375^2 + 12^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890769 - 2⁷ = 1890641 is a prime.

It is a super-2 number, since 2×1890769² = 7150014822722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

1890769 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1890719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945384 + 945385.

It is an arithmetic number, because the mean of its divisors is an integer number (945385).

2^1890769 is an apocalyptic number.

It is an amenable number.

1890769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890769 is an equidigital number, since it uses as much as digits as its factorization.

1890769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1890769 is about 1375.0523626393. The cubic root of 1890769 is about 123.6553253364.

The spelling of 1890769 in words is "one million, eight hundred ninety thousand, seven hundred sixty-nine".