127969001 has 2 divisors, whose sum is σ = 127969002. Its totient is φ = 127969000.

The previous prime is 127968983. The next prime is 127969003. The reversal of 127969001 is 100969721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117072400 + 10896601 = 10820^2 + 3301^2 .

It is a cyclic number.

It is not a de Polignac number, because 127969001 - 2⁶ = 127968937 is a prime.

Together with 127969003, 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 (127969003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63984500 + 63984501.

It is an arithmetic number, because the mean of its divisors is an integer number (63984501).

Almost surely, 2^127969001 is an apocalyptic number.

It is an amenable number.

127969001 is a deficient number, since it is larger than the sum of its proper divisors (1).

127969001 is an equidigital number, since it uses as much as digits as its factorization.

127969001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 127969001 is about 11312.3384408353. The cubic root of 127969001 is about 503.9277330351.

The spelling of 127969001 in words is "one hundred twenty-seven million, nine hundred sixty-nine thousand, one".