839849477 has 2 divisors, whose sum is σ = 839849478. Its totient is φ = 839849476.

The previous prime is 839849459. The next prime is 839849539. The reversal of 839849477 is 774948938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 838334116 + 1515361 = 28954^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 839849477 - 2¹² = 839845381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (839849407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419924738 + 419924739.

It is an arithmetic number, because the mean of its divisors is an integer number (419924739).

Almost surely, 2^839849477 is an apocalyptic number.

It is an amenable number.

839849477 is a deficient number, since it is larger than the sum of its proper divisors (1).

839849477 is an equidigital number, since it uses as much as digits as its factorization.

839849477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 59.

The square root of 839849477 is about 28980.1566075824. The cubic root of 839849477 is about 943.4824338513.

It can be divided in two parts, 8398 and 49477, that added together give a palindrome (57875).

The spelling of 839849477 in words is "eight hundred thirty-nine million, eight hundred forty-nine thousand, four hundred seventy-seven".