123146047 has 2 divisors, whose sum is σ = 123146048. Its totient is φ = 123146046.

The previous prime is 123146041. The next prime is 123146057. The reversal of 123146047 is 740641321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123146047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123146041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61573023 + 61573024.

It is an arithmetic number, because the mean of its divisors is an integer number (61573024).

Almost surely, 2^123146047 is an apocalyptic number.

123146047 is a deficient number, since it is larger than the sum of its proper divisors (1).

123146047 is an equidigital number, since it uses as much as digits as its factorization.

123146047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 123146047 is about 11097.1188603169. The cubic root of 123146047 is about 497.5157400136.

Adding to 123146047 its reverse (740641321), we get a palindrome (863787368).

It can be divided in two parts, 1231 and 46047, that added together give a triangular number (47278 = T₃₀₇).

The spelling of 123146047 in words is "one hundred twenty-three million, one hundred forty-six thousand, forty-seven".