126699073 has 2 divisors, whose sum is σ = 126699074. Its totient is φ = 126699072.

The previous prime is 126699071. The next prime is 126699149. The reversal of 126699073 is 370996621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88962624 + 37736449 = 9432^2 + 6143^2 .

It is a cyclic number.

It is not a de Polignac number, because 126699073 - 2¹ = 126699071 is a prime.

Together with 126699071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (126699071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63349536 + 63349537.

It is an arithmetic number, because the mean of its divisors is an integer number (63349537).

Almost surely, 2^126699073 is an apocalyptic number.

It is an amenable number.

126699073 is a deficient number, since it is larger than the sum of its proper divisors (1).

126699073 is an equidigital number, since it uses as much as digits as its factorization.

126699073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 126699073 is about 11256.0682744909. The cubic root of 126699073 is about 502.2552431296.

The spelling of 126699073 in words is "one hundred twenty-six million, six hundred ninety-nine thousand, seventy-three".