123551447 has 2 divisors, whose sum is σ = 123551448. Its totient is φ = 123551446.

The previous prime is 123551419. The next prime is 123551453. The reversal of 123551447 is 744155321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123551447 - 2⁶ = 123551383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123751447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61775723 + 61775724.

It is an arithmetic number, because the mean of its divisors is an integer number (61775724).

Almost surely, 2^123551447 is an apocalyptic number.

123551447 is a deficient number, since it is larger than the sum of its proper divisors (1).

123551447 is an equidigital number, since it uses as much as digits as its factorization.

123551447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 32.

The square root of 123551447 is about 11115.3698543953. The cubic root of 123551447 is about 498.0610869512.

The spelling of 123551447 in words is "one hundred twenty-three million, five hundred fifty-one thousand, four hundred forty-seven".