3990101 has 4 divisors (see below), whose sum is σ = 3999552. Its totient is φ = 3980652.

The previous prime is 3990097. The next prime is 3990113. The reversal of 3990101 is 1010993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3990101 - 2² = 3990097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990001) 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, 4061 + ... + 4946.

It is an arithmetic number, because the mean of its divisors is an integer number (999888).

Almost surely, 2^3990101 is an apocalyptic number.

It is an amenable number.

3990101 is a deficient number, since it is larger than the sum of its proper divisors (9451).

3990101 is an equidigital number, since it uses as much as digits as its factorization.

3990101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9450.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 3990101 is about 1997.5237170056. The cubic root of 3990101 is about 158.6090496690.

The spelling of 3990101 in words is "three million, nine hundred ninety thousand, one hundred one".