123632149 has 2 divisors, whose sum is σ = 123632150. Its totient is φ = 123632148.

The previous prime is 123632147. The next prime is 123632209. The reversal of 123632149 is 941236321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79834225 + 43797924 = 8935^2 + 6618^2 .

It is a cyclic number.

It is not a de Polignac number, because 123632149 - 2¹ = 123632147 is a prime.

Together with 123632147, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 123632149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123632147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61816074 + 61816075.

It is an arithmetic number, because the mean of its divisors is an integer number (61816075).

Almost surely, 2^123632149 is an apocalyptic number.

It is an amenable number.

123632149 is a deficient number, since it is larger than the sum of its proper divisors (1).

123632149 is an equidigital number, since it uses as much as digits as its factorization.

123632149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 123632149 is about 11118.9994603831. Note that the first 3 decimals coincide. The cubic root of 123632149 is about 498.1695054238.

The spelling of 123632149 in words is "one hundred twenty-three million, six hundred thirty-two thousand, one hundred forty-nine".