127991953 has 2 divisors, whose sum is σ = 127991954. Its totient is φ = 127991952.

The previous prime is 127991939. The next prime is 127991957. The reversal of 127991953 is 359199721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87834384 + 40157569 = 9372^2 + 6337^2 .

It is a cyclic number.

It is not a de Polignac number, because 127991953 - 2⁵ = 127991921 is a prime.

It is not a weakly prime, because it can be changed into another prime (127991957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63995976 + 63995977.

It is an arithmetic number, because the mean of its divisors is an integer number (63995977).

Almost surely, 2^127991953 is an apocalyptic number.

It is an amenable number.

127991953 is a deficient number, since it is larger than the sum of its proper divisors (1).

127991953 is an equidigital number, since it uses as much as digits as its factorization.

127991953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153090, while the sum is 46.

The square root of 127991953 is about 11313.3528628784. The cubic root of 127991953 is about 503.9578587109.

The spelling of 127991953 in words is "one hundred twenty-seven million, nine hundred ninety-one thousand, nine hundred fifty-three".