126991223 has 2 divisors, whose sum is σ = 126991224. Its totient is φ = 126991222.

The previous prime is 126991171. The next prime is 126991297. The reversal of 126991223 is 322199621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126991223 - 2⁸ = 126990967 is a prime.

It is a super-2 number, since 2×126991223² = 32253541438071458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126991723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63495611 + 63495612.

It is an arithmetic number, because the mean of its divisors is an integer number (63495612).

Almost surely, 2^126991223 is an apocalyptic number.

126991223 is a deficient number, since it is larger than the sum of its proper divisors (1).

126991223 is an equidigital number, since it uses as much as digits as its factorization.

126991223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 126991223 is about 11269.0382464521. The cubic root of 126991223 is about 502.6409897853.

The spelling of 126991223 in words is "one hundred twenty-six million, nine hundred ninety-one thousand, two hundred twenty-three".