123869357 has 4 divisors (see below), whose sum is σ = 124965660. Its totient is φ = 122773056.

The previous prime is 123869311. The next prime is 123869381. The reversal of 123869357 is 753968321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 753968321 = 43 ⋅17534147.

It can be written as a sum of positive squares in 2 ways, for example, as 51466276 + 72403081 = 7174^2 + 8509^2 .

It is a cyclic number.

It is not a de Polignac number, because 123869357 - 2¹⁶ = 123803821 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 (123869387) 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 3 ways as a sum of consecutive naturals, for example, 547982 + ... + 548207.

It is an arithmetic number, because the mean of its divisors is an integer number (31241415).

Almost surely, 2^123869357 is an apocalyptic number.

It is an amenable number.

123869357 is a deficient number, since it is larger than the sum of its proper divisors (1096303).

123869357 is a wasteful number, since it uses less digits than its factorization.

123869357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096302.

The product of its digits is 272160, while the sum is 44.

The square root of 123869357 is about 11129.6611359017. The cubic root of 123869357 is about 498.4879077638.

The spelling of 123869357 in words is "one hundred twenty-three million, eight hundred sixty-nine thousand, three hundred fifty-seven".