126977801 has 2 divisors, whose sum is σ = 126977802. Its totient is φ = 126977800.

The previous prime is 126977713. The next prime is 126977803. The reversal of 126977801 is 108779621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101525776 + 25452025 = 10076^2 + 5045^2 .

It is an emirp because it is prime and its reverse (108779621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126977801 - 2²² = 122783497 is a prime.

It is a super-2 number, since 2×126977801² = 32246723893591202, which contains 22 as substring.

Together with 126977803, 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 (126977803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63488900 + 63488901.

It is an arithmetic number, because the mean of its divisors is an integer number (63488901).

Almost surely, 2^126977801 is an apocalyptic number.

It is an amenable number.

126977801 is a deficient number, since it is larger than the sum of its proper divisors (1).

126977801 is an equidigital number, since it uses as much as digits as its factorization.

126977801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 126977801 is about 11268.4427051834. The cubic root of 126977801 is about 502.6232807266.

The spelling of 126977801 in words is "one hundred twenty-six million, nine hundred seventy-seven thousand, eight hundred one".