169229745 has 36 divisors (see below), whose sum is σ = 306682740. Its totient is φ = 86319552.

The previous prime is 169229743. The next prime is 169229773. The reversal of 169229745 is 547922961.

169229745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 41177889 + 128051856 = 6417^2 + 11316^2 .

It is not a de Polignac number, because 169229745 - 2¹ = 169229743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 169229745.

It is not an unprimeable number, because it can be changed into a prime (169229743) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20251 + ... + 27359.

It is an arithmetic number, because the mean of its divisors is an integer number (8518965).

Almost surely, 2^169229745 is an apocalyptic number.

169229745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

169229745 is a deficient number, since it is larger than the sum of its proper divisors (137452995).

169229745 is a wasteful number, since it uses less digits than its factorization.

169229745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7166 (or 7140 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 169229745 is about 13008.8333450775. The cubic root of 169229745 is about 553.1279021202.

The spelling of 169229745 in words is "one hundred sixty-nine million, two hundred twenty-nine thousand, seven hundred forty-five".