123901031 has 2 divisors, whose sum is σ = 123901032. Its totient is φ = 123901030.

The previous prime is 123901013. The next prime is 123901051. The reversal of 123901031 is 130109321.

Together with previous prime (123901013) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (123901051) can be obtained adding 123901031 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123901031 - 2²⁶ = 56792167 is a prime.

It is a super-2 number, since 2×123901031² = 30702930965725922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123900994 and 123901012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123901051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61950515 + 61950516.

It is an arithmetic number, because the mean of its divisors is an integer number (61950516).

Almost surely, 2^123901031 is an apocalyptic number.

123901031 is a deficient number, since it is larger than the sum of its proper divisors (1).

123901031 is an equidigital number, since it uses as much as digits as its factorization.

123901031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 123901031 is about 11131.0839993237. The cubic root of 123901031 is about 498.5303927410.

The spelling of 123901031 in words is "one hundred twenty-three million, nine hundred one thousand, thirty-one".