428429897 has 4 divisors (see below), whose sum is σ = 489634176. Its totient is φ = 367225620.

The previous prime is 428429873. The next prime is 428429909. The reversal of 428429897 is 798924824.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428429897 - 2¹⁰ = 428428873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428429497) 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, 30602129 + ... + 30602142.

It is an arithmetic number, because the mean of its divisors is an integer number (122408544).

Almost surely, 2^428429897 is an apocalyptic number.

It is an amenable number.

428429897 is a deficient number, since it is larger than the sum of its proper divisors (61204279).

428429897 is an equidigital number, since it uses as much as digits as its factorization.

428429897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61204278.

The product of its digits is 2322432, while the sum is 53.

The square root of 428429897 is about 20698.5481858028. The cubic root of 428429897 is about 753.8644373733.

The spelling of 428429897 in words is "four hundred twenty-eight million, four hundred twenty-nine thousand, eight hundred ninety-seven".