7987237 has 8 divisors (see below), whose sum is σ = 8116056. Its totient is φ = 7859712.

The previous prime is 7987223. The next prime is 7987241. The reversal of 7987237 is 7327897.

It can be written as a sum of positive squares in 4 ways, for example, as 2232036 + 5755201 = 1494^2 + 2399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7987237 - 2¹⁵ = 7954469 is a prime.

It is a d-powerful number, because it can be written as 7³ + 9³ + 8⁷ + 7⁶ + 2 + 3⁸ + 7⁸ .

It is a Duffinian number.

7987237 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7987193 and 7987202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7987247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23533 + ... + 23869.

It is an arithmetic number, because the mean of its divisors is an integer number (1014507).

Almost surely, 2^7987237 is an apocalyptic number.

It is an amenable number.

7987237 is a deficient number, since it is larger than the sum of its proper divisors (128819).

7987237 is a wasteful number, since it uses less digits than its factorization.

7987237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647.

The product of its digits is 148176, while the sum is 43.

The square root of 7987237 is about 2826.1700231939. The cubic root of 7987237 is about 199.8935850560.

The spelling of 7987237 in words is "seven million, nine hundred eighty-seven thousand, two hundred thirty-seven".