164525399 has 2 divisors, whose sum is σ = 164525400. Its totient is φ = 164525398.

The previous prime is 164525393. The next prime is 164525407. The reversal of 164525399 is 993525461.

It is a weak prime.

It is an emirp because it is prime and its reverse (993525461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164525399 - 2⁸ = 164525143 is a prime.

It is a super-2 number, since 2×164525399² = 54137213832218402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164525393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82262699 + 82262700.

It is an arithmetic number, because the mean of its divisors is an integer number (82262700).

Almost surely, 2^164525399 is an apocalyptic number.

164525399 is a deficient number, since it is larger than the sum of its proper divisors (1).

164525399 is an equidigital number, since it uses as much as digits as its factorization.

164525399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 44.

The square root of 164525399 is about 12826.7454562722. The cubic root of 164525399 is about 547.9542725177.

The spelling of 164525399 in words is "one hundred sixty-four million, five hundred twenty-five thousand, three hundred ninety-nine".