191385025 has 12 divisors (see below), whose sum is σ = 255573052. Its totient is φ = 141330240.

The previous prime is 191384993. The next prime is 191385037. The reversal of 191385025 is 520583191.

It can be written as a sum of positive squares in 6 ways, for example, as 81072016 + 110313009 = 9004^2 + 10503^2 .

It is not a de Polignac number, because 191385025 - 2⁵ = 191384993 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 294114 + ... + 294763.

Almost surely, 2^191385025 is an apocalyptic number.

It is an amenable number.

191385025 is a deficient number, since it is larger than the sum of its proper divisors (64188027).

191385025 is a wasteful number, since it uses less digits than its factorization.

191385025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588900 (or 588895 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 191385025 is about 13834.1976637606. The cubic root of 191385025 is about 576.2832336224.

The spelling of 191385025 in words is "one hundred ninety-one million, three hundred eighty-five thousand, twenty-five".