123936149 has 4 divisors (see below), whose sum is σ = 125328780. Its totient is φ = 122543520.

The previous prime is 123936139. The next prime is 123936151. The reversal of 123936149 is 941639321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84309124 + 39627025 = 9182^2 + 6295^2 .

It is a cyclic number.

It is not a de Polignac number, because 123936149 - 2¹⁶ = 123870613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123936139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696182 + ... + 696359.

It is an arithmetic number, because the mean of its divisors is an integer number (31332195).

Almost surely, 2^123936149 is an apocalyptic number.

It is an amenable number.

123936149 is a deficient number, since it is larger than the sum of its proper divisors (1392631).

123936149 is an equidigital number, since it uses as much as digits as its factorization.

123936149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392630.

The product of its digits is 34992, while the sum is 38.

The square root of 123936149 is about 11132.6613619565. The cubic root of 123936149 is about 498.5774887616.

The spelling of 123936149 in words is "one hundred twenty-three million, nine hundred thirty-six thousand, one hundred forty-nine".