126646969 has 2 divisors, whose sum is σ = 126646970. Its totient is φ = 126646968.

The previous prime is 126646937. The next prime is 126646987. The reversal of 126646969 is 969646621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109935225 + 16711744 = 10485^2 + 4088^2 .

It is a cyclic number.

It is not a de Polignac number, because 126646969 - 2⁵ = 126646937 is a prime.

It is a super-2 number, since 2×126646969² = 32078909513773922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126646369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63323484 + 63323485.

It is an arithmetic number, because the mean of its divisors is an integer number (63323485).

Almost surely, 2^126646969 is an apocalyptic number.

It is an amenable number.

126646969 is a deficient number, since it is larger than the sum of its proper divisors (1).

126646969 is an equidigital number, since it uses as much as digits as its factorization.

126646969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The square root of 126646969 is about 11253.7535515934. The cubic root of 126646969 is about 502.1863841797.

The spelling of 126646969 in words is "one hundred twenty-six million, six hundred forty-six thousand, nine hundred sixty-nine".