169431929 has 2 divisors, whose sum is σ = 169431930. Its totient is φ = 169431928.

The previous prime is 169431919. The next prime is 169431943. The reversal of 169431929 is 929134961.

It is a happy number.

169431929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142754704 + 26677225 = 11948^2 + 5165^2 .

It is an emirp because it is prime and its reverse (929134961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 169431929 - 2²⁰ = 168383353 is a prime.

It is a super-3 number, since 3×169431929³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 169431929.

It is not a weakly prime, because it can be changed into another prime (169431919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84715964 + 84715965.

It is an arithmetic number, because the mean of its divisors is an integer number (84715965).

Almost surely, 2^169431929 is an apocalyptic number.

It is an amenable number.

169431929 is a deficient number, since it is larger than the sum of its proper divisors (1).

169431929 is an equidigital number, since it uses as much as digits as its factorization.

169431929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The square root of 169431929 is about 13016.6020527632. The cubic root of 169431929 is about 553.3480941128.

The spelling of 169431929 in words is "one hundred sixty-nine million, four hundred thirty-one thousand, nine hundred twenty-nine".