123690043 has 4 divisors (see below), whose sum is σ = 123723688. Its totient is φ = 123656400.

The previous prime is 123690037. The next prime is 123690103. The reversal of 123690043 is 340096321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340096321 = 10631 ⋅31991.

It is a cyclic number.

It is not a de Polignac number, because 123690043 - 2¹⁷ = 123558971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123689993 and 123690020.

It is not an unprimeable number, because it can be changed into a prime (123690143) 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, 10521 + ... + 18922.

It is an arithmetic number, because the mean of its divisors is an integer number (30930922).

Almost surely, 2^123690043 is an apocalyptic number.

123690043 is a deficient number, since it is larger than the sum of its proper divisors (33645).

123690043 is an equidigital number, since it uses as much as digits as its factorization.

123690043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33644.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 123690043 is about 11121.6025374044. The cubic root of 123690043 is about 498.2472536064.

The spelling of 123690043 in words is "one hundred twenty-three million, six hundred ninety thousand, forty-three".