123995884377949 has 2 divisors, whose sum is σ = 123995884377950. Its totient is φ = 123995884377948.

The previous prime is 123995884377923. The next prime is 123995884377971. The reversal of 123995884377949 is 949773488599321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113236946451225 + 10758937926724 = 10641285^2 + 3280082^2 .

It is a cyclic number.

It is not a de Polignac number, because 123995884377949 - 2⁷ = 123995884377821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123995884377949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123995884374949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61997942188974 + 61997942188975.

It is an arithmetic number, because the mean of its divisors is an integer number (61997942188975).

Almost surely, 2^{123995884377949} is an apocalyptic number.

It is an amenable number.

123995884377949 is a deficient number, since it is larger than the sum of its proper divisors (1).

123995884377949 is an equidigital number, since it uses as much as digits as its factorization.

123995884377949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29628426240, while the sum is 88.

The spelling of 123995884377949 in words is "one hundred twenty-three trillion, nine hundred ninety-five billion, eight hundred eighty-four million, three hundred seventy-seven thousand, nine hundred forty-nine".