123739445407 has 2 divisors, whose sum is σ = 123739445408. Its totient is φ = 123739445406.

The previous prime is 123739445399. The next prime is 123739445443. The reversal of 123739445407 is 704544937321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123739445407 - 2³ = 123739445399 is a prime.

It is a super-2 number, since 2×123739445407² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123739445477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61869722703 + 61869722704.

It is an arithmetic number, because the mean of its divisors is an integer number (61869722704).

Almost surely, 2^123739445407 is an apocalyptic number.

123739445407 is a deficient number, since it is larger than the sum of its proper divisors (1).

123739445407 is an equidigital number, since it uses as much as digits as its factorization.

123739445407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 123739445407 in words is "one hundred twenty-three billion, seven hundred thirty-nine million, four hundred forty-five thousand, four hundred seven".