123406465423 has 2 divisors, whose sum is σ = 123406465424. Its totient is φ = 123406465422.

The previous prime is 123406465421. The next prime is 123406465439. The reversal of 123406465423 is 324564604321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123406465423 - 2¹ = 123406465421 is a prime.

Together with 123406465421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123406465421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61703232711 + 61703232712.

It is an arithmetic number, because the mean of its divisors is an integer number (61703232712).

Almost surely, 2^123406465423 is an apocalyptic number.

123406465423 is a deficient number, since it is larger than the sum of its proper divisors (1).

123406465423 is an equidigital number, since it uses as much as digits as its factorization.

123406465423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 123406465423 in words is "one hundred twenty-three billion, four hundred six million, four hundred sixty-five thousand, four hundred twenty-three".