3999113 has 2 divisors, whose sum is σ = 3999114. Its totient is φ = 3999112.

The previous prime is 3999109. The next prime is 3999143. The reversal of 3999113 is 3119993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3433609 + 565504 = 1853^2 + 752^2 .

It is a cyclic number.

It is not a de Polignac number, because 3999113 - 2² = 3999109 is a prime.

It is not a weakly prime, because it can be changed into another prime (3999143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999556 + 1999557.

It is an arithmetic number, because the mean of its divisors is an integer number (1999557).

Almost surely, 2^3999113 is an apocalyptic number.

It is an amenable number.

3999113 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999113 is an equidigital number, since it uses as much as digits as its factorization.

3999113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6561, while the sum is 35.

The square root of 3999113 is about 1999.7782377054. The cubic root of 3999113 is about 158.7283707900.

It can be divided in two parts, 39991 and 13, that added together give a palindrome (40004).

The spelling of 3999113 in words is "three million, nine hundred ninety-nine thousand, one hundred thirteen".