867047993 has 12 divisors (see below), whose sum is σ = 1009161972. Its totient is φ = 742775040.

The previous prime is 867047981. The next prime is 867048053. The reversal of 867047993 is 399740768.

It can be written as a sum of positive squares in 2 ways, for example, as 370293049 + 496754944 = 19243^2 + 22288^2 .

It is not a de Polignac number, because 867047993 - 2²² = 862853689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (867047393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114773 + ... + 122093.

It is an arithmetic number, because the mean of its divisors is an integer number (84096831).

Almost surely, 2^867047993 is an apocalyptic number.

It is an amenable number.

867047993 is a deficient number, since it is larger than the sum of its proper divisors (142113979).

867047993 is a wasteful number, since it uses less digits than its factorization.

867047993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9752 (or 9745 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 867047993 is about 29445.6786812598. The cubic root of 867047993 is about 953.5593137845.

The spelling of 867047993 in words is "eight hundred sixty-seven million, forty-seven thousand, nine hundred ninety-three".