123700031 has 16 divisors (see below), whose sum is σ = 152577600. Its totient is φ = 97659648.

The previous prime is 123700019. The next prime is 123700037. The reversal of 123700031 is 130007321.

It is a cyclic number.

It is not a de Polignac number, because 123700031 - 2¹⁸ = 123437887 is a prime.

It is a super-2 number, since 2×123700031² = 30603395338801922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123699982 and 123700009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123700037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50585 + ... + 52973.

It is an arithmetic number, because the mean of its divisors is an integer number (9536100).

Almost surely, 2^123700031 is an apocalyptic number.

123700031 is a deficient number, since it is larger than the sum of its proper divisors (28877569).

123700031 is a wasteful number, since it uses less digits than its factorization.

123700031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2978.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 123700031 is about 11122.0515643473. The cubic root of 123700031 is about 498.2606644396.

Adding to 123700031 its reverse (130007321), we get a palindrome (253707352).

The spelling of 123700031 in words is "one hundred twenty-three million, seven hundred thousand, thirty-one".