1373989 has 2 divisors, whose sum is σ = 1373990. Its totient is φ = 1373988.

The previous prime is 1373959. The next prime is 1374007. The reversal of 1373989 is 9893731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1361889 + 12100 = 1167^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373989 - 2⁷ = 1373861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373959) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686994 + 686995.

It is an arithmetic number, because the mean of its divisors is an integer number (686995).

2^1373989 is an apocalyptic number.

It is an amenable number.

1373989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373989 is an equidigital number, since it uses as much as digits as its factorization.

1373989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 1373989 is about 1172.1727688357. The cubic root of 1373989 is about 111.1717439810.

The spelling of 1373989 in words is "one million, three hundred seventy-three thousand, nine hundred eighty-nine".