839949801 has 4 divisors (see below), whose sum is σ = 1119933072. Its totient is φ = 559966532.

The previous prime is 839949769. The next prime is 839949827. The reversal of 839949801 is 108949938.

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 839949801 - 2⁵ = 839949769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (839949101) 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, 139991631 + ... + 139991636.

It is an arithmetic number, because the mean of its divisors is an integer number (279983268).

Almost surely, 2^839949801 is an apocalyptic number.

It is an amenable number.

839949801 is a deficient number, since it is larger than the sum of its proper divisors (279983271).

839949801 is a wasteful number, since it uses less digits than its factorization.

839949801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279983270.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 839949801 is about 28981.8874644147. The cubic root of 839949801 is about 943.5200001714.

The spelling of 839949801 in words is "eight hundred thirty-nine million, nine hundred forty-nine thousand, eight hundred one".