806926391 has 2 divisors, whose sum is σ = 806926392. Its totient is φ = 806926390.

The previous prime is 806926387. The next prime is 806926397. The reversal of 806926391 is 193629608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 806926391 - 2² = 806926387 is a prime.

It is a super-2 number, since 2×806926391² = 1302260400984569762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806926397) 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 as a sum of consecutive naturals, namely, 403463195 + 403463196.

It is an arithmetic number, because the mean of its divisors is an integer number (403463196).

Almost surely, 2^806926391 is an apocalyptic number.

806926391 is a deficient number, since it is larger than the sum of its proper divisors (1).

806926391 is an equidigital number, since it uses as much as digits as its factorization.

806926391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 806926391 is about 28406.4498133787. The cubic root of 806926391 is about 930.9891933585.

The spelling of 806926391 in words is "eight hundred six million, nine hundred twenty-six thousand, three hundred ninety-one".