123977 has 8 divisors (see below), whose sum is σ = 144000. Its totient is φ = 104544.

The previous prime is 123973. The next prime is 123979. The reversal of 123977 is 779321.

It is a happy number.

123977 is nontrivially palindromic in base 12.

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

It is a cyclic number.

It is not a de Polignac number, because 123977 - 2² = 123973 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123973) 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, 524 + ... + 722.

It is an arithmetic number, because the mean of its divisors is an integer number (18000).

2¹²³⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

123977 is a deficient number, since it is larger than the sum of its proper divisors (20023).

123977 is an equidigital number, since it uses as much as digits as its factorization.

123977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295.

The product of its digits is 2646, while the sum is 29.

The square root of 123977 is about 352.1036779132. The cubic root of 123977 is about 49.8632261997.

The spelling of 123977 in words is "one hundred twenty-three thousand, nine hundred seventy-seven".