807243947 has 4 divisors (see below), whose sum is σ = 808693776. Its totient is φ = 805794120.

The previous prime is 807243907. The next prime is 807243967. The reversal of 807243947 is 749342708.

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

It is a cyclic number.

It is not a de Polignac number, because 807243947 - 2¹⁴ = 807227563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 807243898 and 807243907.

It is not an unprimeable number, because it can be changed into a prime (807243907) 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, 724079 + ... + 725192.

It is an arithmetic number, because the mean of its divisors is an integer number (202173444).

Almost surely, 2^807243947 is an apocalyptic number.

807243947 is a deficient number, since it is larger than the sum of its proper divisors (1449829).

807243947 is a wasteful number, since it uses less digits than its factorization.

807243947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449828.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 807243947 is about 28412.0387688036. The cubic root of 807243947 is about 931.1113038071. Note that the first 3 decimals are identical.

The spelling of 807243947 in words is "eight hundred seven million, two hundred forty-three thousand, nine hundred forty-seven".