19460989 has 2 divisors, whose sum is σ = 19460990. Its totient is φ = 19460988.

The previous prime is 19460977. The next prime is 19460993. The reversal of 19460989 is 98906491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11108889 + 8352100 = 3333^2 + 2890^2 .

It is a cyclic number.

It is not a de Polignac number, because 19460989 - 2²³ = 11072381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19460999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9730494 + 9730495.

It is an arithmetic number, because the mean of its divisors is an integer number (9730495).

Almost surely, 2^19460989 is an apocalyptic number.

It is an amenable number.

19460989 is a deficient number, since it is larger than the sum of its proper divisors (1).

19460989 is an equidigital number, since it uses as much as digits as its factorization.

19460989 is an odious number, because the sum of its binary digits is odd.

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

The square root of 19460989 is about 4411.4610958275. The cubic root of 19460989 is about 268.9810197449.

It can be divided in two parts, 19460 and 989, that added together give a square (20449 = 143²).

The spelling of 19460989 in words is "nineteen million, four hundred sixty thousand, nine hundred eighty-nine".