3997263 has 4 divisors (see below), whose sum is σ = 5329688. Its totient is φ = 2664840.

The previous prime is 3997241. The next prime is 3997267. The reversal of 3997263 is 3627993.

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

It is not a de Polignac number, because 3997263 - 2¹⁸ = 3735119 is a prime.

It is a super-2 number, since 2×3997263² = 31956222982338, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997267) 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, 666208 + ... + 666213.

It is an arithmetic number, because the mean of its divisors is an integer number (1332422).

Almost surely, 2^3997263 is an apocalyptic number.

3997263 is a deficient number, since it is larger than the sum of its proper divisors (1332425).

3997263 is a wasteful number, since it uses less digits than its factorization.

3997263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332424.

The product of its digits is 61236, while the sum is 39.

The square root of 3997263 is about 1999.3156329104. The cubic root of 3997263 is about 158.7038909634.

The spelling of 3997263 in words is "three million, nine hundred ninety-seven thousand, two hundred sixty-three".