126403973 has 2 divisors, whose sum is σ = 126403974. Its totient is φ = 126403972.

The previous prime is 126403913. The next prime is 126404023. The reversal of 126403973 is 379304621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68674369 + 57729604 = 8287^2 + 7598^2 .

It is a cyclic number.

It is not a de Polignac number, because 126403973 - 2¹⁰ = 126402949 is a prime.

It is equal to p_7185482 and since 126403973 and 7185482 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126403913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63201986 + 63201987.

It is an arithmetic number, because the mean of its divisors is an integer number (63201987).

Almost surely, 2^126403973 is an apocalyptic number.

It is an amenable number.

126403973 is a deficient number, since it is larger than the sum of its proper divisors (1).

126403973 is an equidigital number, since it uses as much as digits as its factorization.

126403973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 126403973 is about 11242.9521479014. The cubic root of 126403973 is about 501.8649989090.

The spelling of 126403973 in words is "one hundred twenty-six million, four hundred three thousand, nine hundred seventy-three".