127979897 has 2 divisors, whose sum is σ = 127979898. Its totient is φ = 127979896.

The previous prime is 127979837. The next prime is 127979903. The reversal of 127979897 is 798979721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69288976 + 58690921 = 8324^2 + 7661^2 .

It is a cyclic number.

It is not a de Polignac number, because 127979897 - 2²⁴ = 111202681 is a prime.

It is a super-2 number, since 2×127979897² = 32757708072261218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127979807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63989948 + 63989949.

It is an arithmetic number, because the mean of its divisors is an integer number (63989949).

Almost surely, 2^127979897 is an apocalyptic number.

It is an amenable number.

127979897 is a deficient number, since it is larger than the sum of its proper divisors (1).

127979897 is an equidigital number, since it uses as much as digits as its factorization.

127979897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 59.

The square root of 127979897 is about 11312.8200286224. The cubic root of 127979897 is about 503.9420350424.

The spelling of 127979897 in words is "one hundred twenty-seven million, nine hundred seventy-nine thousand, eight hundred ninety-seven".