123772030729 has 2 divisors, whose sum is σ = 123772030730. Its totient is φ = 123772030728.

The previous prime is 123772030709. The next prime is 123772030807. The reversal of 123772030729 is 927030277321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103812840000 + 19959190729 = 322200^2 + 141277^2 .

It is a cyclic number.

It is not a de Polignac number, because 123772030729 - 2⁷ = 123772030601 is a prime.

It is not a weakly prime, because it can be changed into another prime (123772030709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61886015364 + 61886015365.

It is an arithmetic number, because the mean of its divisors is an integer number (61886015365).

Almost surely, 2^123772030729 is an apocalyptic number.

It is an amenable number.

123772030729 is a deficient number, since it is larger than the sum of its proper divisors (1).

123772030729 is an equidigital number, since it uses as much as digits as its factorization.

123772030729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 43.

The spelling of 123772030729 in words is "one hundred twenty-three billion, seven hundred seventy-two million, thirty thousand, seven hundred twenty-nine".