6997237 has 4 divisors (see below), whose sum is σ = 7535500. Its totient is φ = 6458976.

The previous prime is 6997231. The next prime is 6997253. The reversal of 6997237 is 7327996.

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 576081 + 6421156 = 759^2 + 2534^2 .

It is a cyclic number.

It is not a de Polignac number, because 6997237 - 2³ = 6997229 is a prime.

It is a super-2 number, since 2×6997237² = 97922651268338, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6⁸ + 9³ + 9⁶ + 7² + 2⁵ + 3¹⁴ + 7⁴ .

It is a Duffinian number.

6997237 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6997193 and 6997202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6997231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269112 + ... + 269137.

It is an arithmetic number, because the mean of its divisors is an integer number (1883875).

Almost surely, 2^6997237 is an apocalyptic number.

It is an amenable number.

6997237 is a deficient number, since it is larger than the sum of its proper divisors (538263).

6997237 is a wasteful number, since it uses less digits than its factorization.

6997237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538262.

The product of its digits is 142884, while the sum is 43.

The square root of 6997237 is about 2645.2291016092. The cubic root of 6997237 is about 191.2679462562.

The spelling of 6997237 in words is "six million, nine hundred ninety-seven thousand, two hundred thirty-seven".