123787 has 2 divisors, whose sum is σ = 123788. Its totient is φ = 123786.

The previous prime is 123757. The next prime is 123791. The reversal of 123787 is 787321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123787 - 2¹⁵ = 91019 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61893 + 61894.

It is an arithmetic number, because the mean of its divisors is an integer number (61894).

2¹²³⁷⁸⁷ is an apocalyptic number.

123787 is a deficient number, since it is larger than the sum of its proper divisors (1).

123787 is an equidigital number, since it uses as much as digits as its factorization.

123787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 28.

The square root of 123787 is about 351.8337675664. The cubic root of 123787 is about 49.8377406745.

The spelling of 123787 in words is "one hundred twenty-three thousand, seven hundred eighty-seven".