1897389 has 12 divisors (see below), whose sum is σ = 2951676. Its totient is φ = 1167552.

The previous prime is 1897367. The next prime is 1897403. The reversal of 1897389 is 9837981.

It can be written as a sum of positive squares in 2 ways, for example, as 887364 + 1010025 = 942^2 + 1005^2 .

It is not a de Polignac number, because 1897389 - 2¹⁶ = 1831853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1897589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7992 + ... + 8225.

It is an arithmetic number, because the mean of its divisors is an integer number (245973).

2^1897389 is an apocalyptic number.

It is an amenable number.

1897389 is a deficient number, since it is larger than the sum of its proper divisors (1054287).

1897389 is a wasteful number, since it uses less digits than its factorization.

1897389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16236 (or 16233 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1897389 is about 1377.4574403589. The cubic root of 1897389 is about 123.7994721083.

The spelling of 1897389 in words is "one million, eight hundred ninety-seven thousand, three hundred eighty-nine".