126434989 has 2 divisors, whose sum is σ = 126434990. Its totient is φ = 126434988.

The previous prime is 126434981. The next prime is 126434999. The reversal of 126434989 is 989434621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126225225 + 209764 = 11235^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 126434989 - 2³ = 126434981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126434981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63217494 + 63217495.

It is an arithmetic number, because the mean of its divisors is an integer number (63217495).

Almost surely, 2^126434989 is an apocalyptic number.

It is an amenable number.

126434989 is a deficient number, since it is larger than the sum of its proper divisors (1).

126434989 is an equidigital number, since it uses as much as digits as its factorization.

126434989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 126434989 is about 11244.3314163182. The cubic root of 126434989 is about 501.9060434307.

The spelling of 126434989 in words is "one hundred twenty-six million, four hundred thirty-four thousand, nine hundred eighty-nine".