123394137091934 has 16 divisors (see below), whose sum is σ = 193138894301472. Its totient is φ = 59014512462048.

The previous prime is 123394137091933. The next prime is 123394137091987. The reversal of 123394137091934 is 439190731493321.

It is a happy number.

It is a super-2 number, since 2×123394137091934² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123394137091933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56043332 + ... + 58203464.

It is an arithmetic number, because the mean of its divisors is an integer number (12071180893842).

Almost surely, 2^{123394137091934} is an apocalyptic number.

123394137091934 is a deficient number, since it is larger than the sum of its proper divisors (69744757209538).

123394137091934 is a wasteful number, since it uses less digits than its factorization.

123394137091934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3401971.

The product of its (nonzero) digits is 13226976, while the sum is 59.

The spelling of 123394137091934 in words is "one hundred twenty-three trillion, three hundred ninety-four billion, one hundred thirty-seven million, ninety-one thousand, nine hundred thirty-four".