623434140647 has 2 divisors, whose sum is σ = 623434140648. Its totient is φ = 623434140646.

The previous prime is 623434140643. The next prime is 623434140671. The reversal of 623434140647 is 746041434326.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 623434140647 - 2² = 623434140643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623434140598 and 623434140607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623434140643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311717070323 + 311717070324.

It is an arithmetic number, because the mean of its divisors is an integer number (311717070324).

Almost surely, 2^623434140647 is an apocalyptic number.

623434140647 is a deficient number, since it is larger than the sum of its proper divisors (1).

623434140647 is an equidigital number, since it uses as much as digits as its factorization.

623434140647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 44.

The spelling of 623434140647 in words is "six hundred twenty-three billion, four hundred thirty-four million, one hundred forty thousand, six hundred forty-seven".