127937969 has 2 divisors, whose sum is σ = 127937970. Its totient is φ = 127937968.

The previous prime is 127937947. The next prime is 127937977. The reversal of 127937969 is 969739721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108472225 + 19465744 = 10415^2 + 4412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127937969 is a prime.

It is a super-2 number, since 2×127937969² = 32736247823689922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 127937969.

It is not a weakly prime, because it can be changed into another prime (127933969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63968984 + 63968985.

It is an arithmetic number, because the mean of its divisors is an integer number (63968985).

Almost surely, 2^127937969 is an apocalyptic number.

It is an amenable number.

127937969 is a deficient number, since it is larger than the sum of its proper divisors (1).

127937969 is an equidigital number, since it uses as much as digits as its factorization.

127937969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1285956, while the sum is 53.

The square root of 127937969 is about 11310.9667579743. The cubic root of 127937969 is about 503.8869962173.

The spelling of 127937969 in words is "one hundred twenty-seven million, nine hundred thirty-seven thousand, nine hundred sixty-nine".