123990994 has 4 divisors (see below), whose sum is σ = 185986494. Its totient is φ = 61995496.

The previous prime is 123990983. The next prime is 123991019. The reversal of 123990994 is 499099321.

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

It can be written as a sum of positive squares in only one way, i.e., 121815369 + 2175625 = 11037^2 + 1475^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30997747 + ... + 30997750.

Almost surely, 2^123990994 is an apocalyptic number.

123990994 is a deficient number, since it is larger than the sum of its proper divisors (61995500).

123990994 is an equidigital number, since it uses as much as digits as its factorization.

123990994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61995499.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 123990994 is about 11135.1243369798. The cubic root of 123990994 is about 498.6510224589.

The spelling of 123990994 in words is "one hundred twenty-three million, nine hundred ninety thousand, nine hundred ninety-four".