3699981 has 12 divisors (see below), whose sum is σ = 5458752. Its totient is φ = 2413896.

The previous prime is 3699961. The next prime is 3700001. The reversal of 3699981 is 1899963.

3699981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3699961) and next prime (3700001).

It is not a de Polignac number, because 3699981 - 2⁷ = 3699853 is a prime.

It is a super-2 number, since 2×3699981² = 27379718800722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3¹² + 6⁵ + 9³ + 9⁶ + 9⁶ + 8⁷ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3699901) 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 11 ways as a sum of consecutive naturals, for example, 3951 + ... + 4796.

It is an arithmetic number, because the mean of its divisors is an integer number (454896).

Almost surely, 2^3699981 is an apocalyptic number.

It is an amenable number.

3699981 is a deficient number, since it is larger than the sum of its proper divisors (1758771).

3699981 is a wasteful number, since it uses less digits than its factorization.

3699981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8800 (or 8797 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 3699981 is about 1923.5334673460. The cubic root of 3699981 is about 154.6677726297.

The spelling of 3699981 in words is "three million, six hundred ninety-nine thousand, nine hundred eighty-one".