126147997 has 2 divisors, whose sum is σ = 126147998. Its totient is φ = 126147996.

The previous prime is 126147991. The next prime is 126148037. The reversal of 126147997 is 799741621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121572676 + 4575321 = 11026^2 + 2139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126147997 is a prime.

It is a super-2 number, since 2×126147997² = 31826634294224018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126147991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63073998 + 63073999.

It is an arithmetic number, because the mean of its divisors is an integer number (63073999).

Almost surely, 2^126147997 is an apocalyptic number.

It is an amenable number.

126147997 is a deficient number, since it is larger than the sum of its proper divisors (1).

126147997 is an equidigital number, since it uses as much as digits as its factorization.

126147997 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 126147997 is about 11231.5625359965. The cubic root of 126147997 is about 501.5260005731.

The spelling of 126147997 in words is "one hundred twenty-six million, one hundred forty-seven thousand, nine hundred ninety-seven".