169724090 has 16 divisors (see below), whose sum is σ = 323474472. Its totient is φ = 63896064.

The previous prime is 169724089. The next prime is 169724099. The reversal of 169724090 is 90427961.

169724090 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 157979761 + 11744329 = 12569^2 + 3427^2 .

It is not an unprimeable number, because it can be changed into a prime (169724099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499019 + ... + 499358.

Almost surely, 2^169724090 is an apocalyptic number.

169724090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

169724090 is a deficient number, since it is larger than the sum of its proper divisors (153750382).

169724090 is a wasteful number, since it uses less digits than its factorization.

169724090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998401.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 169724090 is about 13027.8198483092. The cubic root of 169724090 is about 553.6659678821.

The spelling of 169724090 in words is "one hundred sixty-nine million, seven hundred twenty-four thousand, ninety".