207128019 has 32 divisors (see below), whose sum is σ = 327061504. Its totient is φ = 114099840.

The previous prime is 207128003. The next prime is 207128027. The reversal of 207128019 is 910821702.

It is not a de Polignac number, because 207128019 - 2⁴ = 207128003 is a prime.

It is a super-2 number, since 2×207128019² = 85804032509728722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (207128819) 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 in 31 ways as a sum of consecutive naturals, for example, 242397 + ... + 243249.

It is an arithmetic number, because the mean of its divisors is an integer number (10220672).

Almost surely, 2^207128019 is an apocalyptic number.

207128019 is a deficient number, since it is larger than the sum of its proper divisors (119933485).

207128019 is a wasteful number, since it uses less digits than its factorization.

207128019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 207128019 is about 14391.9428500811. The cubic root of 207128019 is about 591.6700923516.

The spelling of 207128019 in words is "two hundred seven million, one hundred twenty-eight thousand, nineteen".