123687311252 has 6 divisors (see below), whose sum is σ = 216452794698. Its totient is φ = 61843655624.

The previous prime is 123687311243. The next prime is 123687311261. The reversal of 123687311252 is 252113786321.

It is an interprime number because it is at equal distance from previous prime (123687311243) and next prime (123687311261).

It can be written as a sum of positive squares in only one way, i.e., 117261044356 + 6426266896 = 342434^2 + 80164^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15460913903 + ... + 15460913910.

It is an arithmetic number, because the mean of its divisors is an integer number (36075465783).

Almost surely, 2^123687311252 is an apocalyptic number.

It is an amenable number.

123687311252 is a deficient number, since it is larger than the sum of its proper divisors (92765483446).

123687311252 is a wasteful number, since it uses less digits than its factorization.

123687311252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30921827817 (or 30921827815 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The spelling of 123687311252 in words is "one hundred twenty-three billion, six hundred eighty-seven million, three hundred eleven thousand, two hundred fifty-two".