123290690 has 32 divisors (see below), whose sum is σ = 230138496. Its totient is φ = 47520640.

The previous prime is 123290683. The next prime is 123290693. The reversal of 123290690 is 96092321.

It is a super-2 number, since 2×123290690² = 30401188481352200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123290693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32219 + ... + 35841.

It is an arithmetic number, because the mean of its divisors is an integer number (7191828).

Almost surely, 2^123290690 is an apocalyptic number.

123290690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123290690 is a deficient number, since it is larger than the sum of its proper divisors (106847806).

123290690 is a wasteful number, since it uses less digits than its factorization.

123290690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 123290690 is about 11103.6340897924. The cubic root of 123290690 is about 497.7104519419.

The spelling of 123290690 in words is "one hundred twenty-three million, two hundred ninety thousand, six hundred ninety".