126994391 has 2 divisors, whose sum is σ = 126994392. Its totient is φ = 126994390.

The previous prime is 126994333. The next prime is 126994411. The reversal of 126994391 is 193499621.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126994391 is a prime.

It is a super-2 number, since 2×126994391² = 32255150690921762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126994331) 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, 63497195 + 63497196.

It is an arithmetic number, because the mean of its divisors is an integer number (63497196).

Almost surely, 2^126994391 is an apocalyptic number.

126994391 is a deficient number, since it is larger than the sum of its proper divisors (1).

126994391 is an equidigital number, since it uses as much as digits as its factorization.

126994391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 44.

The square root of 126994391 is about 11269.1788077038. The cubic root of 126994391 is about 502.6451694795.

The spelling of 126994391 in words is "one hundred twenty-six million, nine hundred ninety-four thousand, three hundred ninety-one".