164525591 has 2 divisors, whose sum is σ = 164525592. Its totient is φ = 164525590.

The previous prime is 164525573. The next prime is 164525593. The reversal of 164525591 is 195525461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164525591 - 2⁶ = 164525527 is a prime.

Together with 164525593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164525593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82262795 + 82262796.

It is an arithmetic number, because the mean of its divisors is an integer number (82262796).

Almost surely, 2^164525591 is an apocalyptic number.

164525591 is a deficient number, since it is larger than the sum of its proper divisors (1).

164525591 is an equidigital number, since it uses as much as digits as its factorization.

164525591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 38.

The square root of 164525591 is about 12826.7529406315. The cubic root of 164525591 is about 547.9544856706.

The spelling of 164525591 in words is "one hundred sixty-four million, five hundred twenty-five thousand, five hundred ninety-one".