123402134039 has 2 divisors, whose sum is σ = 123402134040. Its totient is φ = 123402134038.

The previous prime is 123402134033. The next prime is 123402134047. The reversal of 123402134039 is 930431204321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123402134039 - 2¹² = 123402129943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123402133996 and 123402134014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123402134033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61701067019 + 61701067020.

It is an arithmetic number, because the mean of its divisors is an integer number (61701067020).

Almost surely, 2^123402134039 is an apocalyptic number.

123402134039 is a deficient number, since it is larger than the sum of its proper divisors (1).

123402134039 is an equidigital number, since it uses as much as digits as its factorization.

123402134039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 123402134039 in words is "one hundred twenty-three billion, four hundred two million, one hundred thirty-four thousand, thirty-nine".