65987629 has 2 divisors, whose sum is σ = 65987630. Its totient is φ = 65987628.

The previous prime is 65987617. The next prime is 65987639. The reversal of 65987629 is 92678956.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48972004 + 17015625 = 6998^2 + 4125^2 .

It is a cyclic number.

It is not a de Polignac number, because 65987629 - 2²³ = 57599021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65987639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32993814 + 32993815.

It is an arithmetic number, because the mean of its divisors is an integer number (32993815).

Almost surely, 2^65987629 is an apocalyptic number.

It is an amenable number.

65987629 is a deficient number, since it is larger than the sum of its proper divisors (1).

65987629 is an equidigital number, since it uses as much as digits as its factorization.

65987629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 65987629 is about 8123.2769865369. The cubic root of 65987629 is about 404.0987508985.

It can be divided in two parts, 659 and 87629, that added together give a palindrome (88288).

The spelling of 65987629 in words is "sixty-five million, nine hundred eighty-seven thousand, six hundred twenty-nine".