123709065831 has 16 divisors (see below), whose sum is σ = 197370589920. Its totient is φ = 76128655680.

The previous prime is 123709065827. The next prime is 123709065847. The reversal of 123709065831 is 138560907321.

It is not a de Polignac number, because 123709065831 - 2² = 123709065827 is a prime.

It is a super-2 number, since 2×123709065831² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123709065871) 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 in 15 ways as a sum of consecutive naturals, for example, 176223390 + ... + 176224091.

It is an arithmetic number, because the mean of its divisors is an integer number (12335661870).

Almost surely, 2^123709065831 is an apocalyptic number.

123709065831 is a deficient number, since it is larger than the sum of its proper divisors (73661524089).

123709065831 is a wasteful number, since it uses less digits than its factorization.

123709065831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352447503 (or 352447497 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 123709065831 in words is "one hundred twenty-three billion, seven hundred nine million, sixty-five thousand, eight hundred thirty-one".