1969489 has 2 divisors, whose sum is σ = 1969490. Its totient is φ = 1969488.

The previous prime is 1969459. The next prime is 1969511. The reversal of 1969489 is 9849691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 173889 = 1340^2 + 417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1969489 - 2⁹ = 1968977 is a prime.

It is a super-2 number, since 2×1969489² = 7757773842242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1969459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984744 + 984745.

It is an arithmetic number, because the mean of its divisors is an integer number (984745).

2^1969489 is an apocalyptic number.

It is an amenable number.

1969489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969489 is an equidigital number, since it uses as much as digits as its factorization.

1969489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 46.

The square root of 1969489 is about 1403.3848367429. The cubic root of 1969489 is about 125.3481282205.

The spelling of 1969489 in words is "one million, nine hundred sixty-nine thousand, four hundred eighty-nine".