127857797 has 2 divisors, whose sum is σ = 127857798. Its totient is φ = 127857796.

The previous prime is 127857673. The next prime is 127857823. The reversal of 127857797 is 797758721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89094721 + 38763076 = 9439^2 + 6226^2 .

It is a cyclic number.

It is not a de Polignac number, because 127857797 - 2¹⁸ = 127595653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127857097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63928898 + 63928899.

It is an arithmetic number, because the mean of its divisors is an integer number (63928899).

Almost surely, 2^127857797 is an apocalyptic number.

It is an amenable number.

127857797 is a deficient number, since it is larger than the sum of its proper divisors (1).

127857797 is an equidigital number, since it uses as much as digits as its factorization.

127857797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728720, while the sum is 53.

The square root of 127857797 is about 11307.4222084434. The cubic root of 127857797 is about 503.7817210597.

The spelling of 127857797 in words is "one hundred twenty-seven million, eight hundred fifty-seven thousand, seven hundred ninety-seven".