123347531563 has 2 divisors, whose sum is σ = 123347531564. Its totient is φ = 123347531562.

The previous prime is 123347531551. The next prime is 123347531581. The reversal of 123347531563 is 365135743321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123347531563 - 2⁹ = 123347531051 is a prime.

It is a super-2 number, since 2×123347531563² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123347531513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61673765781 + 61673765782.

It is an arithmetic number, because the mean of its divisors is an integer number (61673765782).

Almost surely, 2^123347531563 is an apocalyptic number.

123347531563 is a deficient number, since it is larger than the sum of its proper divisors (1).

123347531563 is an equidigital number, since it uses as much as digits as its factorization.

123347531563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 43.

The spelling of 123347531563 in words is "one hundred twenty-three billion, three hundred forty-seven million, five hundred thirty-one thousand, five hundred sixty-three".