123640013347 has 2 divisors, whose sum is σ = 123640013348. Its totient is φ = 123640013346.

The previous prime is 123640013339. The next prime is 123640013353. The reversal of 123640013347 is 743310046321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123640013347 - 2³ = 123640013339 is a prime.

It is not a weakly prime, because it can be changed into another prime (123640013377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61820006673 + 61820006674.

It is an arithmetic number, because the mean of its divisors is an integer number (61820006674).

Almost surely, 2^123640013347 is an apocalyptic number.

123640013347 is a deficient number, since it is larger than the sum of its proper divisors (1).

123640013347 is an equidigital number, since it uses as much as digits as its factorization.

123640013347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 34.

Adding to 123640013347 its reverse (743310046321), we get a palindrome (866950059668).

The spelling of 123640013347 in words is "one hundred twenty-three billion, six hundred forty million, thirteen thousand, three hundred forty-seven".