123674991 has 8 divisors (see below), whose sum is σ = 179890944. Its totient is φ = 74954520.

The previous prime is 123674977. The next prime is 123675049. The reversal of 123674991 is 199476321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123674991 - 2⁵ = 123674959 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123674891) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1873831 + ... + 1873896.

It is an arithmetic number, because the mean of its divisors is an integer number (22486368).

Almost surely, 2^123674991 is an apocalyptic number.

123674991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123674991 is a deficient number, since it is larger than the sum of its proper divisors (56215953).

123674991 is a wasteful number, since it uses less digits than its factorization.

123674991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3747741.

The product of its digits is 81648, while the sum is 42.

The square root of 123674991 is about 11120.9258157763. The cubic root of 123674991 is about 498.2270420040.

The spelling of 123674991 in words is "one hundred twenty-three million, six hundred seventy-four thousand, nine hundred ninety-one".