3890999 has 4 divisors (see below), whose sum is σ = 4446864. Its totient is φ = 3335136.

The previous prime is 3890981. The next prime is 3891037. The reversal of 3890999 is 9990983.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9990983 = 1327 ⋅7529.

It is not a de Polignac number, because 3890999 - 2⁸ = 3890743 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3890969) 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, 277922 + ... + 277935.

It is an arithmetic number, because the mean of its divisors is an integer number (1111716).

Almost surely, 2^3890999 is an apocalyptic number.

3890999 is a deficient number, since it is larger than the sum of its proper divisors (555865).

3890999 is an equidigital number, since it uses as much as digits as its factorization.

3890999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555864.

The product of its (nonzero) digits is 157464, while the sum is 47.

The square root of 3890999 is about 1972.5615326271. The cubic root of 3890999 is about 157.2849033206.

The spelling of 3890999 in words is "three million, eight hundred ninety thousand, nine hundred ninety-nine".