191852945 has 4 divisors (see below), whose sum is σ = 230223540. Its totient is φ = 153482352.

The previous prime is 191852933. The next prime is 191852953. The reversal of 191852945 is 549258191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549258191 = 20543 ⋅26737.

It can be written as a sum of positive squares in 2 ways, for example, as 129868816 + 61984129 = 11396^2 + 7873^2 .

It is a cyclic number.

It is not a de Polignac number, because 191852945 - 2⁴ = 191852929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191852896 and 191852905.

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, 19185290 + ... + 19185299.

It is an arithmetic number, because the mean of its divisors is an integer number (57555885).

Almost surely, 2^191852945 is an apocalyptic number.

It is an amenable number.

191852945 is a deficient number, since it is larger than the sum of its proper divisors (38370595).

191852945 is an equidigital number, since it uses as much as digits as its factorization.

191852945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38370594.

The product of its digits is 129600, while the sum is 44.

The square root of 191852945 is about 13851.0990538657. The cubic root of 191852945 is about 576.7525057750.

The spelling of 191852945 in words is "one hundred ninety-one million, eight hundred fifty-two thousand, nine hundred forty-five".