123143477 has 2 divisors, whose sum is σ = 123143478. Its totient is φ = 123143476.

The previous prime is 123143429. The next prime is 123143479. The reversal of 123143477 is 774341321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107453956 + 15689521 = 10366^2 + 3961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123143477 is a prime.

Together with 123143479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123143479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61571738 + 61571739.

It is an arithmetic number, because the mean of its divisors is an integer number (61571739).

Almost surely, 2^123143477 is an apocalyptic number.

It is an amenable number.

123143477 is a deficient number, since it is larger than the sum of its proper divisors (1).

123143477 is an equidigital number, since it uses as much as digits as its factorization.

123143477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 32.

The square root of 123143477 is about 11097.0030638907. The cubic root of 123143477 is about 497.5122790165.

Adding to 123143477 its reverse (774341321), we get a palindrome (897484798).

The spelling of 123143477 in words is "one hundred twenty-three million, one hundred forty-three thousand, four hundred seventy-seven".