126471979 has 2 divisors, whose sum is σ = 126471980. Its totient is φ = 126471978.

The previous prime is 126471977. The next prime is 126472001. The reversal of 126471979 is 979174621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126471979 - 2¹ = 126471977 is a prime.

It is a super-2 number, since 2×126471979² = 31990322944352882, which contains 22 as substring.

Together with 126471977, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126471977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63235989 + 63235990.

It is an arithmetic number, because the mean of its divisors is an integer number (63235990).

Almost surely, 2^126471979 is an apocalyptic number.

126471979 is a deficient number, since it is larger than the sum of its proper divisors (1).

126471979 is an equidigital number, since it uses as much as digits as its factorization.

126471979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 126471979 is about 11245.9761248190. The cubic root of 126471979 is about 501.9549847732.

The spelling of 126471979 in words is "one hundred twenty-six million, four hundred seventy-one thousand, nine hundred seventy-nine".