123743881 has 2 divisors, whose sum is σ = 123743882. Its totient is φ = 123743880.

The previous prime is 123743839. The next prime is 123743911. The reversal of 123743881 is 188347321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109935225 + 13808656 = 10485^2 + 3716^2 .

It is a cyclic number.

It is not a de Polignac number, because 123743881 - 2¹⁵ = 123711113 is a prime.

It is a super-2 number, since 2×123743881² = 30625096169884322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123743881.

It is not a weakly prime, because it can be changed into another prime (123743801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61871940 + 61871941.

It is an arithmetic number, because the mean of its divisors is an integer number (61871941).

Almost surely, 2^123743881 is an apocalyptic number.

It is an amenable number.

123743881 is a deficient number, since it is larger than the sum of its proper divisors (1).

123743881 is an equidigital number, since it uses as much as digits as its factorization.

123743881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 123743881 is about 11124.0226986464. The cubic root of 123743881 is about 498.3195330558.

The spelling of 123743881 in words is "one hundred twenty-three million, seven hundred forty-three thousand, eight hundred eighty-one".