838134977 has 2 divisors, whose sum is σ = 838134978. Its totient is φ = 838134976.

The previous prime is 838134961. The next prime is 838135007. The reversal of 838134977 is 779431838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 822485041 + 15649936 = 28679^2 + 3956^2 .

It is a cyclic number.

It is not a de Polignac number, because 838134977 - 2⁴ = 838134961 is a prime.

It is not a weakly prime, because it can be changed into another prime (838134917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419067488 + 419067489.

It is an arithmetic number, because the mean of its divisors is an integer number (419067489).

Almost surely, 2^838134977 is an apocalyptic number.

It is an amenable number.

838134977 is a deficient number, since it is larger than the sum of its proper divisors (1).

838134977 is an equidigital number, since it uses as much as digits as its factorization.

838134977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 838134977 is about 28950.5609099375. The cubic root of 838134977 is about 942.8399764147.

The spelling of 838134977 in words is "eight hundred thirty-eight million, one hundred thirty-four thousand, nine hundred seventy-seven".