405123354244187 has 2 divisors, whose sum is σ = 405123354244188. Its totient is φ = 405123354244186.

The previous prime is 405123354244157. The next prime is 405123354244207. The reversal of 405123354244187 is 781442453321504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405123354244187 - 2¹² = 405123354240091 is a prime.

It is a super-2 number, since 2×405123354244187² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405123354244127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202561677122093 + 202561677122094.

It is an arithmetic number, because the mean of its divisors is an integer number (202561677122094).

Almost surely, 2^{405123354244187} is an apocalyptic number.

405123354244187 is a deficient number, since it is larger than the sum of its proper divisors (1).

405123354244187 is an equidigital number, since it uses as much as digits as its factorization.

405123354244187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12902400, while the sum is 53.

The spelling of 405123354244187 in words is "four hundred five trillion, one hundred twenty-three billion, three hundred fifty-four million, two hundred forty-four thousand, one hundred eighty-seven".