191361025 has 6 divisors (see below), whose sum is σ = 237287702. Its totient is φ = 153088800.

The previous prime is 191361019. The next prime is 191361041. The reversal of 191361025 is 520163191.

It can be written as a sum of positive squares in 3 ways, for example, as 62583921 + 128777104 = 7911^2 + 11348^2 .

It is not a de Polignac number, because 191361025 - 2¹¹ = 191358977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 191360984 and 191361002.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3827196 + ... + 3827245.

Almost surely, 2^191361025 is an apocalyptic number.

It is an amenable number.

191361025 is a deficient number, since it is larger than the sum of its proper divisors (45926677).

191361025 is an equidigital number, since it uses as much as digits as its factorization.

191361025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7654451 (or 7654446 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 191361025 is about 13833.3302208832. The cubic root of 191361025 is about 576.2591436572.

The spelling of 191361025 in words is "one hundred ninety-one million, three hundred sixty-one thousand, twenty-five".