123720568 has 8 divisors (see below), whose sum is σ = 231976080. Its totient is φ = 61860280.

The previous prime is 123720551. The next prime is 123720593. The reversal of 123720568 is 865027321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7732528 + ... + 7732543.

It is an arithmetic number, because the mean of its divisors is an integer number (28997010).

Almost surely, 2^123720568 is an apocalyptic number.

It is an amenable number.

123720568 is a deficient number, since it is larger than the sum of its proper divisors (108255512).

123720568 is a wasteful number, since it uses less digits than its factorization.

123720568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15465077 (or 15465073 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 123720568 is about 11122.9747819547. The cubic root of 123720568 is about 498.2882370897.

Adding to 123720568 its reverse (865027321), we get a palindrome (988747889).

The spelling of 123720568 in words is "one hundred twenty-three million, seven hundred twenty thousand, five hundred sixty-eight".