808021147 has 4 divisors (see below), whose sum is σ = 809680816. Its totient is φ = 806361480.

The previous prime is 808021141. The next prime is 808021163. The reversal of 808021147 is 741120808.

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 808021147 - 2²³ = 799632539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (808021141) 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, 829104 + ... + 830077.

It is an arithmetic number, because the mean of its divisors is an integer number (202420204).

Almost surely, 2^808021147 is an apocalyptic number.

808021147 is a deficient number, since it is larger than the sum of its proper divisors (1659669).

808021147 is a wasteful number, since it uses less digits than its factorization.

808021147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659668.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 808021147 is about 28425.7127791020. The cubic root of 808021147 is about 931.4100270493.

It can be divided in two parts, 80802114 and 7, that added together give a square (80802121 = 8989²).

The spelling of 808021147 in words is "eight hundred eight million, twenty-one thousand, one hundred forty-seven".