806936257 has 4 divisors (see below), whose sum is σ = 817150720. Its totient is φ = 796721796.

The previous prime is 806936149. The next prime is 806936267. The reversal of 806936257 is 752639608.

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 a de Polignac number, because none of the positive numbers 2^k-806936257 is a prime.

It is a super-2 number, since 2×806936257² = 1302292245722340098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (806936267) 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, 5107113 + ... + 5107270.

It is an arithmetic number, because the mean of its divisors is an integer number (204287680).

Almost surely, 2^806936257 is an apocalyptic number.

It is an amenable number.

806936257 is a deficient number, since it is larger than the sum of its proper divisors (10214463).

806936257 is a wasteful number, since it uses less digits than its factorization.

806936257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10214462.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 806936257 is about 28406.6234705922. The cubic root of 806936257 is about 930.9929876335.

The spelling of 806936257 in words is "eight hundred six million, nine hundred thirty-six thousand, two hundred fifty-seven".