65637623 has 2 divisors, whose sum is σ = 65637624. Its totient is φ = 65637622.

The previous prime is 65637619. The next prime is 65637661. The reversal of 65637623 is 32673656.

It is an a-pointer prime, because the next prime (65637661) can be obtained adding 65637623 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65637623 - 2² = 65637619 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65637613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32818811 + 32818812.

It is an arithmetic number, because the mean of its divisors is an integer number (32818812).

Almost surely, 2^65637623 is an apocalyptic number.

65637623 is a deficient number, since it is larger than the sum of its proper divisors (1).

65637623 is an equidigital number, since it uses as much as digits as its factorization.

65637623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 38.

The square root of 65637623 is about 8101.7049440226. The cubic root of 65637623 is about 403.3830218288.

The spelling of 65637623 in words is "sixty-five million, six hundred thirty-seven thousand, six hundred twenty-three".