123397751 has 4 divisors (see below), whose sum is σ = 123425904. Its totient is φ = 123369600.

The previous prime is 123397739. The next prime is 123397753. The reversal of 123397751 is 157793321.

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

It is a cyclic number.

It is not a de Polignac number, because 123397751 - 2¹⁴ = 123381367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123397753) 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, 5930 + ... + 16791.

It is an arithmetic number, because the mean of its divisors is an integer number (30856476).

Almost surely, 2^123397751 is an apocalyptic number.

123397751 is a deficient number, since it is larger than the sum of its proper divisors (28153).

123397751 is an equidigital number, since it uses as much as digits as its factorization.

123397751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28152.

The product of its digits is 39690, while the sum is 38.

The square root of 123397751 is about 11108.4540328526. The cubic root of 123397751 is about 497.8544746102.

The spelling of 123397751 in words is "one hundred twenty-three million, three hundred ninety-seven thousand, seven hundred fifty-one".