806390357 has 4 divisors (see below), whose sum is σ = 812276556. Its totient is φ = 800504160.

The previous prime is 806390329. The next prime is 806390369. The reversal of 806390357 is 753093608.

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 147646801 + 658743556 = 12151^2 + 25666^2 .

It is a cyclic number.

It is not a de Polignac number, because 806390357 - 2¹² = 806386261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806390857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2942894 + ... + 2943167.

It is an arithmetic number, because the mean of its divisors is an integer number (203069139).

Almost surely, 2^806390357 is an apocalyptic number.

It is an amenable number.

806390357 is a deficient number, since it is larger than the sum of its proper divisors (5886199).

806390357 is a wasteful number, since it uses less digits than its factorization.

806390357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5886198.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 806390357 is about 28397.0131704023. The cubic root of 806390357 is about 930.7829984231.

The spelling of 806390357 in words is "eight hundred six million, three hundred ninety thousand, three hundred fifty-seven".