2631997 has 4 divisors (see below), whose sum is σ = 2661660. Its totient is φ = 2602336.

The previous prime is 2631989. The next prime is 2632001. The reversal of 2631997 is 7991362.

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 423801 + 2208196 = 651^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2631997 - 2³ = 2631989 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 (2631917) 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, 14698 + ... + 14875.

It is an arithmetic number, because the mean of its divisors is an integer number (665415).

2^2631997 is an apocalyptic number.

It is an amenable number.

2631997 is a deficient number, since it is larger than the sum of its proper divisors (29663).

2631997 is an equidigital number, since it uses as much as digits as its factorization.

2631997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29662.

The product of its digits is 20412, while the sum is 37.

The square root of 2631997 is about 1622.3430586655. The cubic root of 2631997 is about 138.0686663803.

It can be divided in two parts, 26 and 31997, that added together give a palindrome (32023).

The spelling of 2631997 in words is "two million, six hundred thirty-one thousand, nine hundred ninety-seven".