169012497 has 4 divisors (see below), whose sum is σ = 225350000. Its totient is φ = 112674996.

The previous prime is 169012471. The next prime is 169012499. The reversal of 169012497 is 794210961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 794210961 = 3 ⋅264736987.

It is not a de Polignac number, because 169012497 - 2⁶ = 169012433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169012499) 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, 28168747 + ... + 28168752.

It is an arithmetic number, because the mean of its divisors is an integer number (56337500).

Almost surely, 2^169012497 is an apocalyptic number.

It is an amenable number.

169012497 is a deficient number, since it is larger than the sum of its proper divisors (56337503).

169012497 is an equidigital number, since it uses as much as digits as its factorization.

169012497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56337502.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 169012497 is about 13000.4806449608. The cubic root of 169012497 is about 552.8911088621.

The spelling of 169012497 in words is "one hundred sixty-nine million, twelve thousand, four hundred ninety-seven".