123900557 has 8 divisors (see below), whose sum is σ = 139825440. Its totient is φ = 108752560.

The previous prime is 123900551. The next prime is 123900559. The reversal of 123900557 is 755009321.

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 123900557 - 2⁴ = 123900541 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 (123900551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193883 + ... + 194520.

It is an arithmetic number, because the mean of its divisors is an integer number (17478180).

Almost surely, 2^123900557 is an apocalyptic number.

It is an amenable number.

123900557 is a deficient number, since it is larger than the sum of its proper divisors (15924883).

123900557 is a wasteful number, since it uses less digits than its factorization.

123900557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388443.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 123900557 is about 11131.0627075765. The cubic root of 123900557 is about 498.5297570086.

Adding to 123900557 its reverse (755009321), we get a palindrome (878909878).

The spelling of 123900557 in words is "one hundred twenty-three million, nine hundred thousand, five hundred fifty-seven".