163449725 has 6 divisors (see below), whose sum is σ = 202677690. Its totient is φ = 130759760.

The previous prime is 163449703. The next prime is 163449731. The reversal of 163449725 is 527944361.

It can be written as a sum of positive squares in 3 ways, for example, as 8048569 + 155401156 = 2837^2 + 12466^2 .

It is not a de Polignac number, because 163449725 - 2¹⁴ = 163433341 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 3268970 + ... + 3269019.

It is an arithmetic number, because the mean of its divisors is an integer number (33779615).

Almost surely, 2^163449725 is an apocalyptic number.

It is an amenable number.

163449725 is a deficient number, since it is larger than the sum of its proper divisors (39227965).

163449725 is an equidigital number, since it uses as much as digits as its factorization.

163449725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6537999 (or 6537994 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 163449725 is about 12784.7457933273. The cubic root of 163449725 is about 546.7574777669.

The spelling of 163449725 in words is "one hundred sixty-three million, four hundred forty-nine thousand, seven hundred twenty-five".