123766397 has 4 divisors (see below), whose sum is σ = 124554876. Its totient is φ = 122977920.

The previous prime is 123766393. The next prime is 123766411. The reversal of 123766397 is 793667321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17799961 + 105966436 = 4219^2 + 10294^2 .

It is a cyclic number.

It is not a de Polignac number, because 123766397 - 2² = 123766393 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 (123766393) 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, 394004 + ... + 394317.

It is an arithmetic number, because the mean of its divisors is an integer number (31138719).

Almost surely, 2^123766397 is an apocalyptic number.

It is an amenable number.

123766397 is a deficient number, since it is larger than the sum of its proper divisors (788479).

123766397 is an equidigital number, since it uses as much as digits as its factorization.

123766397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788478.

The product of its digits is 285768, while the sum is 44.

The square root of 123766397 is about 11125.0346965751. The cubic root of 123766397 is about 498.3497553775.

The spelling of 123766397 in words is "one hundred twenty-three million, seven hundred sixty-six thousand, three hundred ninety-seven".