4071997 has 4 divisors (see below), whose sum is σ = 4171356. Its totient is φ = 3972640.

The previous prime is 4071983. The next prime is 4072007. The reversal of 4071997 is 7991704.

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 427716 + 3644281 = 654^2 + 1909^2 .

It is a cyclic number.

It is not a de Polignac number, because 4071997 - 2⁷ = 4071869 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 (4071917) 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, 49618 + ... + 49699.

It is an arithmetic number, because the mean of its divisors is an integer number (1042839).

Almost surely, 2^4071997 is an apocalyptic number.

It is an amenable number.

4071997 is a deficient number, since it is larger than the sum of its proper divisors (99359).

4071997 is an equidigital number, since it uses as much as digits as its factorization.

4071997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99358.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 4071997 is about 2017.9189775608. The cubic root of 4071997 is about 159.6868484380.

The spelling of 4071997 in words is "four million, seventy-one thousand, nine hundred ninety-seven".