190128131 has 4 divisors (see below), whose sum is σ = 192806064. Its totient is φ = 187450200.

The previous prime is 190128101. The next prime is 190128139. The reversal of 190128131 is 131821091.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 190128131 - 2¹⁰ = 190127107 is a prime.

It is a super-2 number, since 2×190128131² = 72297412395106322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190128131.

It is not an unprimeable number, because it can be changed into a prime (190128139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1338860 + ... + 1339001.

It is an arithmetic number, because the mean of its divisors is an integer number (48201516).

Almost surely, 2^190128131 is an apocalyptic number.

190128131 is a deficient number, since it is larger than the sum of its proper divisors (2677933).

190128131 is an equidigital number, since it uses as much as digits as its factorization.

190128131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677932.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 190128131 is about 13788.6957686360. The cubic root of 190128131 is about 575.0189090190.

The spelling of 190128131 in words is "one hundred ninety million, one hundred twenty-eight thousand, one hundred thirty-one".