806921895387 has 18 divisors (see below), whose sum is σ = 1124757651612. Its totient is φ = 514536070224.

The previous prime is 806921895349. The next prime is 806921895389. The reversal of 806921895387 is 783598129608.

It is a happy number.

It is not a de Polignac number, because 806921895387 - 2⁶ = 806921895323 is a prime.

It is a super-2 number, since 2×806921895387² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (806921895389) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35773989 + ... + 35796537.

Almost surely, 2^806921895387 is an apocalyptic number.

806921895387 is a deficient number, since it is larger than the sum of its proper divisors (317835756225).

806921895387 is an frugal number, since it uses more digits than its factorization.

806921895387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45147 (or 22575 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 66.

The spelling of 806921895387 in words is "eight hundred six billion, nine hundred twenty-one million, eight hundred ninety-five thousand, three hundred eighty-seven".