429172385 has 8 divisors (see below), whose sum is σ = 515118120. Its totient is φ = 343263744.

The previous prime is 429172357. The next prime is 429172391. The reversal of 429172385 is 583271924.

It can be written as a sum of positive squares in 4 ways, for example, as 61606801 + 367565584 = 7849^2 + 19172^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 429172385 - 2¹⁰ = 429171361 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39839 + ... + 49451.

It is an arithmetic number, because the mean of its divisors is an integer number (64389765).

Almost surely, 2^429172385 is an apocalyptic number.

It is an amenable number.

429172385 is a deficient number, since it is larger than the sum of its proper divisors (85945735).

429172385 is an equidigital number, since it uses as much as digits as its factorization.

429172385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18547.

The product of its digits is 120960, while the sum is 41.

The square root of 429172385 is about 20716.4761723610. The cubic root of 429172385 is about 754.2996795328.

The spelling of 429172385 in words is "four hundred twenty-nine million, one hundred seventy-two thousand, three hundred eighty-five".