123280631 has 2 divisors, whose sum is σ = 123280632. Its totient is φ = 123280630.

The previous prime is 123280589. The next prime is 123280643. The reversal of 123280631 is 136082321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123280631 - 2¹⁴ = 123264247 is a prime.

It is a super-2 number, since 2×123280631² = 30396227959516322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123280631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123280681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61640315 + 61640316.

It is an arithmetic number, because the mean of its divisors is an integer number (61640316).

Almost surely, 2^123280631 is an apocalyptic number.

123280631 is a deficient number, since it is larger than the sum of its proper divisors (1).

123280631 is an equidigital number, since it uses as much as digits as its factorization.

123280631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 123280631 is about 11103.1811207419. The cubic root of 123280631 is about 497.6969158952.

The spelling of 123280631 in words is "one hundred twenty-three million, two hundred eighty thousand, six hundred thirty-one".