169641431 has 2 divisors, whose sum is σ = 169641432. Its totient is φ = 169641430.

The previous prime is 169641397. The next prime is 169641449. The reversal of 169641431 is 134146961.

169641431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169641431 is a prime.

It is a super-2 number, since 2×169641431² = 57556430223455522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 169641391 and 169641400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169641631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84820715 + 84820716.

It is an arithmetic number, because the mean of its divisors is an integer number (84820716).

Almost surely, 2^169641431 is an apocalyptic number.

169641431 is a deficient number, since it is larger than the sum of its proper divisors (1).

169641431 is an equidigital number, since it uses as much as digits as its factorization.

169641431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 169641431 is about 13024.6470585579. The cubic root of 169641431 is about 553.5760711821.

The spelling of 169641431 in words is "one hundred sixty-nine million, six hundred forty-one thousand, four hundred thirty-one".