123966213 has 64 divisors (see below), whose sum is σ = 205701120. Its totient is φ = 64915200.

The previous prime is 123966211. The next prime is 123966221. The reversal of 123966213 is 312669321.

It is not a de Polignac number, because 123966213 - 2¹ = 123966211 is a prime.

It is a super-2 number, since 2×123966213² = 30735243931122738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123966211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1745968 + ... + 1746038.

It is an arithmetic number, because the mean of its divisors is an integer number (3214080).

Almost surely, 2^123966213 is an apocalyptic number.

It is an amenable number.

123966213 is a deficient number, since it is larger than the sum of its proper divisors (81734907).

123966213 is a wasteful number, since it uses less digits than its factorization.

123966213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218.

The product of its digits is 11664, while the sum is 33.

The square root of 123966213 is about 11134.0115412191. The cubic root of 123966213 is about 498.6177999000.

The spelling of 123966213 in words is "one hundred twenty-three million, nine hundred sixty-six thousand, two hundred thirteen".