805918149 has 24 divisors (see below), whose sum is σ = 1206466560. Its totient is φ = 517795488.

The previous prime is 805918123. The next prime is 805918151. The reversal of 805918149 is 941819508.

It is not a de Polignac number, because 805918149 - 2⁷ = 805918021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805918109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 155884 + ... + 160970.

It is an arithmetic number, because the mean of its divisors is an integer number (50269440).

Almost surely, 2^805918149 is an apocalyptic number.

It is an amenable number.

805918149 is a deficient number, since it is larger than the sum of its proper divisors (400548411).

805918149 is a wasteful number, since it uses less digits than its factorization.

805918149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5729 (or 5726 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 805918149 is about 28388.6975573026. The cubic root of 805918149 is about 930.6012795676.

The spelling of 805918149 in words is "eight hundred five million, nine hundred eighteen thousand, one hundred forty-nine".