123290691 has 16 divisors (see below), whose sum is σ = 166932480. Its totient is φ = 80930880.

The previous prime is 123290683. The next prime is 123290693. The reversal of 123290691 is 196092321.

It is not a de Polignac number, because 123290691 - 2³ = 123290683 is a prime.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57975 + ... + 60063.

It is an arithmetic number, because the mean of its divisors is an integer number (10433280).

Almost surely, 2^123290691 is an apocalyptic number.

123290691 is a deficient number, since it is larger than the sum of its proper divisors (43641789).

123290691 is a wasteful number, since it uses less digits than its factorization.

123290691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 123290691 is about 11103.6341348227. The cubic root of 123290691 is about 497.7104532875.

The spelling of 123290691 in words is "one hundred twenty-three million, two hundred ninety thousand, six hundred ninety-one".