147248639 has 2 divisors, whose sum is σ = 147248640. Its totient is φ = 147248638.

The previous prime is 147248623. The next prime is 147248683. The reversal of 147248639 is 936842741.

It is an a-pointer prime, because the next prime (147248683) can be obtained adding 147248639 to its sum of digits (44).

It is a weak prime.

It is an emirp because it is prime and its reverse (936842741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147248639 - 2⁴ = 147248623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 147248639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147248609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73624319 + 73624320.

It is an arithmetic number, because the mean of its divisors is an integer number (73624320).

Almost surely, 2^147248639 is an apocalyptic number.

147248639 is a deficient number, since it is larger than the sum of its proper divisors (1).

147248639 is an equidigital number, since it uses as much as digits as its factorization.

147248639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The square root of 147248639 is about 12134.6050203540. The cubic root of 147248639 is about 528.0605979099.

The spelling of 147248639 in words is "one hundred forty-seven million, two hundred forty-eight thousand, six hundred thirty-nine".