123361031 has 4 divisors (see below), whose sum is σ = 124747200. Its totient is φ = 121974864.

The previous prime is 123361013. The next prime is 123361039. The reversal of 123361031 is 130163321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123361031 - 2¹⁴ = 123344647 is a prime.

It is a super-2 number, since 2×123361031² = 30435887938765922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123360994 and 123361012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123361039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692951 + ... + 693128.

It is an arithmetic number, because the mean of its divisors is an integer number (31186800).

Almost surely, 2^123361031 is an apocalyptic number.

123361031 is a deficient number, since it is larger than the sum of its proper divisors (1386169).

123361031 is an equidigital number, since it uses as much as digits as its factorization.

123361031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386168.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 123361031 is about 11106.8011146324. The cubic root of 123361031 is about 497.8050868113.

The spelling of 123361031 in words is "one hundred twenty-three million, three hundred sixty-one thousand, thirty-one".