169409231 has 2 divisors, whose sum is σ = 169409232. Its totient is φ = 169409230.

The previous prime is 169409221. The next prime is 169409257. The reversal of 169409231 is 132904961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 169409231 - 2⁶ = 169409167 is a prime.

It is a super-2 number, since 2×169409231² = 57398975096022722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 169409191 and 169409200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169409221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84704615 + 84704616.

It is an arithmetic number, because the mean of its divisors is an integer number (84704616).

Almost surely, 2^169409231 is an apocalyptic number.

169409231 is a deficient number, since it is larger than the sum of its proper divisors (1).

169409231 is an equidigital number, since it uses as much as digits as its factorization.

169409231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 169409231 is about 13015.7301370303. The cubic root of 169409231 is about 553.3233831939.

The spelling of 169409231 in words is "one hundred sixty-nine million, four hundred nine thousand, two hundred thirty-one".