1859489 has 2 divisors, whose sum is σ = 1859490. Its totient is φ = 1859488.

The previous prime is 1859479. The next prime is 1859491. The reversal of 1859489 is 9849581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1380625 + 478864 = 1175^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1859489 - 2⁸ = 1859233 is a prime.

It is a super-2 number, since 2×1859489² = 6915398682242, which contains 22 as substring.

Together with 1859491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1859479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929744 + 929745.

It is an arithmetic number, because the mean of its divisors is an integer number (929745).

2^1859489 is an apocalyptic number.

It is an amenable number.

1859489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1859489 is an equidigital number, since it uses as much as digits as its factorization.

1859489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 1859489 is about 1363.6308151402. The cubic root of 1859489 is about 122.9696313860.

The spelling of 1859489 in words is "one million, eight hundred fifty-nine thousand, four hundred eighty-nine".