164725541 has 2 divisors, whose sum is σ = 164725542. Its totient is φ = 164725540.

The previous prime is 164725439. The next prime is 164725543. The reversal of 164725541 is 145527461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162460516 + 2265025 = 12746^2 + 1505^2 .

It is an emirp because it is prime and its reverse (145527461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164725541 - 2¹⁰ = 164724517 is a prime.

Together with 164725543, 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 (164725543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82362770 + 82362771.

It is an arithmetic number, because the mean of its divisors is an integer number (82362771).

Almost surely, 2^164725541 is an apocalyptic number.

It is an amenable number.

164725541 is a deficient number, since it is larger than the sum of its proper divisors (1).

164725541 is an equidigital number, since it uses as much as digits as its factorization.

164725541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 164725541 is about 12834.5448302618. The cubic root of 164725541 is about 548.1763744440.

The spelling of 164725541 in words is "one hundred sixty-four million, seven hundred twenty-five thousand, five hundred forty-one".