839969953 has 2 divisors, whose sum is σ = 839969954. Its totient is φ = 839969952.

The previous prime is 839969929. The next prime is 839969969. The reversal of 839969953 is 359969938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498718224 + 341251729 = 22332^2 + 18473^2 .

It is a cyclic number.

It is not a de Polignac number, because 839969953 - 2⁹ = 839969441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 839969891 and 839969900.

It is not a weakly prime, because it can be changed into another prime (839963953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419984976 + 419984977.

It is an arithmetic number, because the mean of its divisors is an integer number (419984977).

Almost surely, 2^839969953 is an apocalyptic number.

It is an amenable number.

839969953 is a deficient number, since it is larger than the sum of its proper divisors (1).

839969953 is an equidigital number, since it uses as much as digits as its factorization.

839969953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14171760, while the sum is 61.

The square root of 839969953 is about 28982.2351277468. The cubic root of 839969953 is about 943.5275457267.

The spelling of 839969953 in words is "eight hundred thirty-nine million, nine hundred sixty-nine thousand, nine hundred fifty-three".