829815401 has 4 divisors (see below), whose sum is σ = 830251092. Its totient is φ = 829379712.

The previous prime is 829815397. The next prime is 829815403. The reversal of 829815401 is 104518928.

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 374035600 + 455779801 = 19340^2 + 21349^2 .

It is a cyclic number.

It is not a de Polignac number, because 829815401 - 2² = 829815397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (829815403) 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, 214976 + ... + 218801.

It is an arithmetic number, because the mean of its divisors is an integer number (207562773).

Almost surely, 2^829815401 is an apocalyptic number.

It is an amenable number.

829815401 is a deficient number, since it is larger than the sum of its proper divisors (435691).

829815401 is a wasteful number, since it uses less digits than its factorization.

829815401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435690.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 829815401 is about 28806.5166412046. The cubic root of 829815401 is about 939.7099606904.

The spelling of 829815401 in words is "eight hundred twenty-nine million, eight hundred fifteen thousand, four hundred one".