123297851 has 4 divisors (see below), whose sum is σ = 123321672. Its totient is φ = 123274032.

The previous prime is 123297833. The next prime is 123297869. The reversal of 123297851 is 158792321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158792321 = 881 ⋅180241.

It is an interprime number because it is at equal distance from previous prime (123297833) and next prime (123297869).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123297851 is a prime.

It is a super-2 number, since 2×123297851² = 30404720122436402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123291851) 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, 506 + ... + 15711.

It is an arithmetic number, because the mean of its divisors is an integer number (30830418).

Almost surely, 2^123297851 is an apocalyptic number.

123297851 is a deficient number, since it is larger than the sum of its proper divisors (23821).

123297851 is an equidigital number, since it uses as much as digits as its factorization.

123297851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23820.

The product of its digits is 30240, while the sum is 38.

The square root of 123297851 is about 11103.9565471052. The cubic root of 123297851 is about 497.7200878020.

The spelling of 123297851 in words is "one hundred twenty-three million, two hundred ninety-seven thousand, eight hundred fifty-one".