127990017 has 16 divisors (see below), whose sum is σ = 192725760. Its totient is φ = 83926800.

The previous prime is 127990001. The next prime is 127990043. The reversal of 127990017 is 710099721.

It is not a de Polignac number, because 127990017 - 2⁴ = 127990001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127990817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37209 + ... + 40502.

It is an arithmetic number, because the mean of its divisors is an integer number (12045360).

Almost surely, 2^127990017 is an apocalyptic number.

It is an amenable number.

127990017 is a deficient number, since it is larger than the sum of its proper divisors (64735743).

127990017 is an equidigital number, since it uses as much as digits as its factorization.

127990017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77781 (or 77775 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 127990017 is about 11313.2672999448. The cubic root of 127990017 is about 503.9553177508.

The spelling of 127990017 in words is "one hundred twenty-seven million, nine hundred ninety thousand, seventeen".