126893891 has 2 divisors, whose sum is σ = 126893892. Its totient is φ = 126893890.

The previous prime is 126893869. The next prime is 126893911. The reversal of 126893891 is 198398621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126893891 - 2¹⁰ = 126892867 is a prime.

It is a super-2 number, since 2×126893891² = 32204119146239762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126893801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63446945 + 63446946.

It is an arithmetic number, because the mean of its divisors is an integer number (63446946).

Almost surely, 2^126893891 is an apocalyptic number.

126893891 is a deficient number, since it is larger than the sum of its proper divisors (1).

126893891 is an equidigital number, since it uses as much as digits as its factorization.

126893891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 47.

The square root of 126893891 is about 11264.7188602290. The cubic root of 126893891 is about 502.5125411257.

It can be divided in two parts, 1268 and 93891, that added together give a palindrome (95159).

The spelling of 126893891 in words is "one hundred twenty-six million, eight hundred ninety-three thousand, eight hundred ninety-one".