190771345 has 4 divisors (see below), whose sum is σ = 228925620. Its totient is φ = 152617072.

The previous prime is 190771337. The next prime is 190771351. The reversal of 190771345 is 543177091.

It is a Cunningham number, because it is equal to 13812²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543177091 = 101 ⋅5377991.

It can be written as a sum of positive squares in 2 ways, for example, as 68690944 + 122080401 = 8288^2 + 11049^2 .

It is a cyclic number.

It is not a de Polignac number, because 190771345 - 2³ = 190771337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19077130 + ... + 19077139.

It is an arithmetic number, because the mean of its divisors is an integer number (57231405).

Almost surely, 2^190771345 is an apocalyptic number.

It is an amenable number.

190771345 is a deficient number, since it is larger than the sum of its proper divisors (38154275).

190771345 is an equidigital number, since it uses as much as digits as its factorization.

190771345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38154274.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 190771345 is about 13812.0000362004. Note that the first 4 decimals coincide. The cubic root of 190771345 is about 575.6666194286. Note that the first 4 decimals are identical.

The spelling of 190771345 in words is "one hundred ninety million, seven hundred seventy-one thousand, three hundred forty-five".