123743391 has 8 divisors (see below), whose sum is σ = 174696624. Its totient is φ = 77642880.

The previous prime is 123743353. The next prime is 123743401. The reversal of 123743391 is 193347321.

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

It is a de Polignac number, because none of the positive numbers 2^k-123743391 is a prime.

It is a Smith number, since the sum of its digits (33) 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 (123743311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213120 + ... + 1213221.

It is an arithmetic number, because the mean of its divisors is an integer number (21837078).

Almost surely, 2^123743391 is an apocalyptic number.

123743391 is a deficient number, since it is larger than the sum of its proper divisors (50953233).

123743391 is a wasteful number, since it uses less digits than its factorization.

123743391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426361.

The product of its digits is 13608, while the sum is 33.

The square root of 123743391 is about 11124.0006742179. Note that the first 3 decimals coincide. The cubic root of 123743391 is about 498.3188753078.

The spelling of 123743391 in words is "one hundred twenty-three million, seven hundred forty-three thousand, three hundred ninety-one".