126189493 has 2 divisors, whose sum is σ = 126189494. Its totient is φ = 126189492.

The previous prime is 126189491. The next prime is 126189509. The reversal of 126189493 is 394981621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91814724 + 34374769 = 9582^2 + 5863^2 .

It is a cyclic number.

It is not a de Polignac number, because 126189493 - 2¹ = 126189491 is a prime.

Together with 126189491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126189491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63094746 + 63094747.

It is an arithmetic number, because the mean of its divisors is an integer number (63094747).

Almost surely, 2^126189493 is an apocalyptic number.

It is an amenable number.

126189493 is a deficient number, since it is larger than the sum of its proper divisors (1).

126189493 is an equidigital number, since it uses as much as digits as its factorization.

126189493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 126189493 is about 11233.4096782767. The cubic root of 126189493 is about 501.5809863620.

The spelling of 126189493 in words is "one hundred twenty-six million, one hundred eighty-nine thousand, four hundred ninety-three".