126394993 has 2 divisors, whose sum is σ = 126394994. Its totient is φ = 126394992.

The previous prime is 126394991. The next prime is 126394999. The reversal of 126394993 is 399493621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126157824 + 237169 = 11232^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 126394993 - 2¹ = 126394991 is a prime.

Together with 126394991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (126394991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63197496 + 63197497.

It is an arithmetic number, because the mean of its divisors is an integer number (63197497).

Almost surely, 2^126394993 is an apocalyptic number.

It is an amenable number.

126394993 is a deficient number, since it is larger than the sum of its proper divisors (1).

126394993 is an equidigital number, since it uses as much as digits as its factorization.

126394993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 46.

The square root of 126394993 is about 11242.5527795070. The cubic root of 126394993 is about 501.8531141179.

The spelling of 126394993 in words is "one hundred twenty-six million, three hundred ninety-four thousand, nine hundred ninety-three".