19373989 has 2 divisors, whose sum is σ = 19373990. Its totient is φ = 19373988.

The previous prime is 19373971. The next prime is 19374013. The reversal of 19373989 is 98937391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17892900 + 1481089 = 4230^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 19373989 - 2⁹ = 19373477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19373789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9686994 + 9686995.

It is an arithmetic number, because the mean of its divisors is an integer number (9686995).

Almost surely, 2^19373989 is an apocalyptic number.

It is an amenable number.

19373989 is a deficient number, since it is larger than the sum of its proper divisors (1).

19373989 is an equidigital number, since it uses as much as digits as its factorization.

19373989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 49.

The square root of 19373989 is about 4401.5893720337. The cubic root of 19373989 is about 268.5795960325.

The spelling of 19373989 in words is "nineteen million, three hundred seventy-three thousand, nine hundred eighty-nine".