169427497 has 4 divisors (see below), whose sum is σ = 169557076. Its totient is φ = 169297920.

The previous prime is 169427471. The next prime is 169427501. The reversal of 169427497 is 794724961.

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 159289641 + 10137856 = 12621^2 + 3184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169427497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 169427497.

It is not an unprimeable number, because it can be changed into a prime (169427437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62808 + ... + 65449.

It is an arithmetic number, because the mean of its divisors is an integer number (42389269).

Almost surely, 2^169427497 is an apocalyptic number.

It is an amenable number.

169427497 is a deficient number, since it is larger than the sum of its proper divisors (129579).

169427497 is a wasteful number, since it uses less digits than its factorization.

169427497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129578.

The product of its digits is 762048, while the sum is 49.

The square root of 169427497 is about 13016.4318075270. The cubic root of 169427497 is about 553.3432692447.

The spelling of 169427497 in words is "one hundred sixty-nine million, four hundred twenty-seven thousand, four hundred ninety-seven".