7872437 has 2 divisors, whose sum is σ = 7872438. Its totient is φ = 7872436.

The previous prime is 7872413. The next prime is 7872439. The reversal of 7872437 is 7342787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4519876 + 3352561 = 2126^2 + 1831^2 .

It is an emirp because it is prime and its reverse (7342787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7872437 - 2⁸ = 7872181 is a prime.

Together with 7872439, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7872437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7872439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3936218 + 3936219.

It is an arithmetic number, because the mean of its divisors is an integer number (3936219).

Almost surely, 2^7872437 is an apocalyptic number.

It is an amenable number.

7872437 is a deficient number, since it is larger than the sum of its proper divisors (1).

7872437 is an equidigital number, since it uses as much as digits as its factorization.

7872437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65856, while the sum is 38.

The square root of 7872437 is about 2805.7863425429. The cubic root of 7872437 is about 198.9312742991.

The spelling of 7872437 in words is "seven million, eight hundred seventy-two thousand, four hundred thirty-seven".