126786973 has 2 divisors, whose sum is σ = 126786974. Its totient is φ = 126786972.

The previous prime is 126786949. The next prime is 126786983. The reversal of 126786973 is 379687621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126405049 + 381924 = 11243^2 + 618^2 .

It is a cyclic number.

It is not a de Polignac number, because 126786973 - 2⁵ = 126786941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126786983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63393486 + 63393487.

It is an arithmetic number, because the mean of its divisors is an integer number (63393487).

Almost surely, 2^126786973 is an apocalyptic number.

It is an amenable number.

126786973 is a deficient number, since it is larger than the sum of its proper divisors (1).

126786973 is an equidigital number, since it uses as much as digits as its factorization.

126786973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The square root of 126786973 is about 11259.9721580473. The cubic root of 126786973 is about 502.3713661319.

It can be divided in two parts, 126786 and 973, that multiplied together give a triangular number (123362778 = T₁₅₇₀₇).

The spelling of 126786973 in words is "one hundred twenty-six million, seven hundred eighty-six thousand, nine hundred seventy-three".