127825991 has 2 divisors, whose sum is σ = 127825992. Its totient is φ = 127825990.

The previous prime is 127825979. The next prime is 127826003. The reversal of 127825991 is 199528721.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (127825979) and next prime (127826003).

It is a cyclic number.

It is not a de Polignac number, because 127825991 - 2¹⁰ = 127824967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127825391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63912995 + 63912996.

It is an arithmetic number, because the mean of its divisors is an integer number (63912996).

Almost surely, 2^127825991 is an apocalyptic number.

127825991 is a deficient number, since it is larger than the sum of its proper divisors (1).

127825991 is an equidigital number, since it uses as much as digits as its factorization.

127825991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 44.

The square root of 127825991 is about 11306.0156996176. The cubic root of 127825991 is about 503.7399438910.

The spelling of 127825991 in words is "one hundred twenty-seven million, eight hundred twenty-five thousand, nine hundred ninety-one".