87622637 has 2 divisors, whose sum is σ = 87622638. Its totient is φ = 87622636.

The previous prime is 87622631. The next prime is 87622649. The reversal of 87622637 is 73622678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56942116 + 30680521 = 7546^2 + 5539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87622637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87622594 and 87622603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87622631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43811318 + 43811319.

It is an arithmetic number, because the mean of its divisors is an integer number (43811319).

Almost surely, 2^87622637 is an apocalyptic number.

It is an amenable number.

87622637 is a deficient number, since it is larger than the sum of its proper divisors (1).

87622637 is an equidigital number, since it uses as much as digits as its factorization.

87622637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 41.

The square root of 87622637 is about 9360.6963950339. The cubic root of 87622637 is about 444.1593133485.

Adding to 87622637 its sum of digits (41), we get a palindrome (87622678).

The spelling of 87622637 in words is "eighty-seven million, six hundred twenty-two thousand, six hundred thirty-seven".