164519389 has 2 divisors, whose sum is σ = 164519390. Its totient is φ = 164519388.

The previous prime is 164519359. The next prime is 164519413. The reversal of 164519389 is 983915461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152720164 + 11799225 = 12358^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 164519389 - 2⁵ = 164519357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164519359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82259694 + 82259695.

It is an arithmetic number, because the mean of its divisors is an integer number (82259695).

Almost surely, 2^164519389 is an apocalyptic number.

It is an amenable number.

164519389 is a deficient number, since it is larger than the sum of its proper divisors (1).

164519389 is an equidigital number, since it uses as much as digits as its factorization.

164519389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 164519389 is about 12826.5111780250. The cubic root of 164519389 is about 547.9476003052.

The spelling of 164519389 in words is "one hundred sixty-four million, five hundred nineteen thousand, three hundred eighty-nine".