3807997 has 4 divisors (see below), whose sum is σ = 3879900. Its totient is φ = 3736096.

The previous prime is 3807959. The next prime is 3808001. The reversal of 3807997 is 7997083.

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 3481956 + 326041 = 1866^2 + 571^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3807997 is a prime.

It is a Duffinian number.

3807997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3807907) 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, 35872 + ... + 35977.

It is an arithmetic number, because the mean of its divisors is an integer number (969975).

Almost surely, 2^3807997 is an apocalyptic number.

It is an amenable number.

3807997 is a deficient number, since it is larger than the sum of its proper divisors (71903).

3807997 is an equidigital number, since it uses as much as digits as its factorization.

3807997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71902.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 3807997 is about 1951.4089781489. The cubic root of 3807997 is about 156.1584654276.

The spelling of 3807997 in words is "three million, eight hundred seven thousand, nine hundred ninety-seven".