123505247 has 2 divisors, whose sum is σ = 123505248. Its totient is φ = 123505246.

The previous prime is 123505201. The next prime is 123505267. The reversal of 123505247 is 742505321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123505247 - 2⁸ = 123504991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123505267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61752623 + 61752624.

It is an arithmetic number, because the mean of its divisors is an integer number (61752624).

Almost surely, 2^123505247 is an apocalyptic number.

123505247 is a deficient number, since it is larger than the sum of its proper divisors (1).

123505247 is an equidigital number, since it uses as much as digits as its factorization.

123505247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 123505247 is about 11113.2914566298. The cubic root of 123505247 is about 497.9989986701.

The spelling of 123505247 in words is "one hundred twenty-three million, five hundred five thousand, two hundred forty-seven".