123742447 has 2 divisors, whose sum is σ = 123742448. Its totient is φ = 123742446.

The previous prime is 123742429. The next prime is 123742453. The reversal of 123742447 is 744247321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123742447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123742417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61871223 + 61871224.

It is an arithmetic number, because the mean of its divisors is an integer number (61871224).

Almost surely, 2^123742447 is an apocalyptic number.

123742447 is a deficient number, since it is larger than the sum of its proper divisors (1).

123742447 is an equidigital number, since it uses as much as digits as its factorization.

123742447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 34.

The square root of 123742447 is about 11123.9582433592. The cubic root of 123742447 is about 498.3176081311.

Adding to 123742447 its reverse (744247321), we get a palindrome (867989768).

The spelling of 123742447 in words is "one hundred twenty-three million, seven hundred forty-two thousand, four hundred forty-seven".