834742057 has 4 divisors (see below), whose sum is σ = 837591300. Its totient is φ = 831892816.

The previous prime is 834742049. The next prime is 834742063. The reversal of 834742057 is 750247438.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 563777536 + 270964521 = 23744^2 + 16461^2 .

It is a cyclic number.

It is not a de Polignac number, because 834742057 - 2³ = 834742049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (834742037) 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, 1424182 + ... + 1424767.

It is an arithmetic number, because the mean of its divisors is an integer number (209397825).

Almost surely, 2^834742057 is an apocalyptic number.

It is an amenable number.

834742057 is a deficient number, since it is larger than the sum of its proper divisors (2849243).

834742057 is a wasteful number, since it uses less digits than its factorization.

834742057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849242.

The product of its (nonzero) digits is 188160, while the sum is 40.

The square root of 834742057 is about 28891.9029660561. The cubic root of 834742057 is about 941.5659942532.

The spelling of 834742057 in words is "eight hundred thirty-four million, seven hundred forty-two thousand, fifty-seven".