169449157 has 4 divisors (see below), whose sum is σ = 169735500. Its totient is φ = 169162816.

The previous prime is 169449143. The next prime is 169449167. The reversal of 169449157 is 751944961.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44702596 + 124746561 = 6686^2 + 11169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169449157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169449107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142282 + ... + 143467.

It is an arithmetic number, because the mean of its divisors is an integer number (42433875).

Almost surely, 2^169449157 is an apocalyptic number.

It is an amenable number.

169449157 is a deficient number, since it is larger than the sum of its proper divisors (286343).

169449157 is an equidigital number, since it uses as much as digits as its factorization.

169449157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286342.

The product of its digits is 272160, while the sum is 46.

The square root of 169449157 is about 13017.2638061921. The cubic root of 169449157 is about 553.3668484643.

The spelling of 169449157 in words is "one hundred sixty-nine million, four hundred forty-nine thousand, one hundred fifty-seven".