849578401 has 4 divisors (see below), whose sum is σ = 970946752. Its totient is φ = 728210052.

The previous prime is 849578399. The next prime is 849578413. The reversal of 849578401 is 104875948.

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 849578401 - 2¹ = 849578399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849578441) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 60684165 + ... + 60684178.

It is an arithmetic number, because the mean of its divisors is an integer number (242736688).

Almost surely, 2^849578401 is an apocalyptic number.

It is an amenable number.

849578401 is a deficient number, since it is larger than the sum of its proper divisors (121368351).

849578401 is a wasteful number, since it uses less digits than its factorization.

849578401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121368350.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 849578401 is about 29147.5282142414. The cubic root of 849578401 is about 947.1115966415. Note that the first 3 decimals are identical.

The spelling of 849578401 in words is "eight hundred forty-nine million, five hundred seventy-eight thousand, four hundred one".