65638147 has 2 divisors, whose sum is σ = 65638148. Its totient is φ = 65638146.

The previous prime is 65638117. The next prime is 65638189. The reversal of 65638147 is 74183656.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65638147 - 2²³ = 57249539 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (65638117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32819073 + 32819074.

It is an arithmetic number, because the mean of its divisors is an integer number (32819074).

Almost surely, 2^65638147 is an apocalyptic number.

65638147 is a deficient number, since it is larger than the sum of its proper divisors (1).

65638147 is an equidigital number, since it uses as much as digits as its factorization.

65638147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 65638147 is about 8101.7372828301. The cubic root of 65638147 is about 403.3840952586.

The spelling of 65638147 in words is "sixty-five million, six hundred thirty-eight thousand, one hundred forty-seven".