169140497 has 4 divisors (see below), whose sum is σ = 179089956. Its totient is φ = 159191040.

The previous prime is 169140487. The next prime is 169140509. The reversal of 169140497 is 794041961.

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 133726096 + 35414401 = 11564^2 + 5951^2 .

It is a cyclic number.

It is not a de Polignac number, because 169140497 - 2⁴ = 169140481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169140427) 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, 4974704 + ... + 4974737.

It is an arithmetic number, because the mean of its divisors is an integer number (44772489).

Almost surely, 2^169140497 is an apocalyptic number.

169140497 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

169140497 is a deficient number, since it is larger than the sum of its proper divisors (9949459).

169140497 is an equidigital number, since it uses as much as digits as its factorization.

169140497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9949458.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 169140497 is about 13005.4026081471. The cubic root of 169140497 is about 553.0306492414.

The spelling of 169140497 in words is "one hundred sixty-nine million, one hundred forty thousand, four hundred ninety-seven".