3867993 has 30 divisors (see below), whose sum is σ = 6235614.
Its totient is φ = 2381184.
The previous prime is 3867961. The next prime is 3868003. The reversal of 3867993 is 3997683.
It is a happy number.
3867993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in 3 ways, for example, as 1871424 + 1996569 = 1368^2 + 1413^2
It is not a de Polignac number, because 3867993 - 25 = 3867961 is a prime.
It is a super-2 number, since 2×38679932 = 29922739696098, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (3867923) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 72955 + ... + 73007.
Almost surely, 23867993 is an apocalyptic number.
It is an amenable number.
3867993 is a deficient number, since it is larger than the sum of its proper divisors (2367621).
3867993 is an equidigital number, since it uses as much as digits as its factorization.
3867993 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 135 (or 73 counting only the distinct ones).
The product of its digits is 244944, while the sum is 45.
The square root of 3867993 is about 1966.7213834196.
The cubic root of 3867993 is about 156.9743017157.
The spelling of 3867993 in words is "three million, eight hundred sixty-seven thousand, nine hundred ninety-three".