165247429 has 4 divisors (see below), whose sum is σ = 174967884. Its totient is φ = 155526976.

The previous prime is 165247403. The next prime is 165247451. The reversal of 165247429 is 924742561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116596804 + 48650625 = 10798^2 + 6975^2 .

It is a cyclic number.

It is not a de Polignac number, because 165247429 - 2⁷ = 165247301 is a prime.

It is a super-2 number, since 2×165247429² = 54613425582220082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165247391 and 165247400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165247129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4860202 + ... + 4860235.

It is an arithmetic number, because the mean of its divisors is an integer number (43741971).

Almost surely, 2^165247429 is an apocalyptic number.

It is an amenable number.

165247429 is a deficient number, since it is larger than the sum of its proper divisors (9720455).

165247429 is an equidigital number, since it uses as much as digits as its factorization.

165247429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720454.

The product of its digits is 120960, while the sum is 40.

The square root of 165247429 is about 12854.8601314833. The cubic root of 165247429 is about 548.7546799725.

The spelling of 165247429 in words is "one hundred sixty-five million, two hundred forty-seven thousand, four hundred twenty-nine".