3990797 has 4 divisors (see below), whose sum is σ = 3996540. Its totient is φ = 3985056.

The previous prime is 3990773. The next prime is 3990827. The reversal of 3990797 is 7970993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2468041 + 1522756 = 1571^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 3990797 - 2⁸ = 3990541 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 (3990737) 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, 1658 + ... + 3275.

It is an arithmetic number, because the mean of its divisors is an integer number (999135).

Almost surely, 2^3990797 is an apocalyptic number.

It is an amenable number.

3990797 is a deficient number, since it is larger than the sum of its proper divisors (5743).

3990797 is an equidigital number, since it uses as much as digits as its factorization.

3990797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5742.

The product of its (nonzero) digits is 107163, while the sum is 44.

The square root of 3990797 is about 1997.6979251128. The cubic root of 3990797 is about 158.6182712802.

It can be divided in two parts, 39907 and 97, that added together give a palindrome (40004).

The spelling of 3990797 in words is "three million, nine hundred ninety thousand, seven hundred ninety-seven".