191137057 has 8 divisors (see below), whose sum is σ = 199175400. Its totient is φ = 183195264.

The previous prime is 191137007. The next prime is 191137073. The reversal of 191137057 is 750731191.

It can be written as a sum of positive squares in 4 ways, for example, as 40436881 + 150700176 = 6359^2 + 12276^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 191137057 - 2⁷ = 191136929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191137007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20082 + ... + 28027.

It is an arithmetic number, because the mean of its divisors is an integer number (24896925).

Almost surely, 2^191137057 is an apocalyptic number.

It is an amenable number.

191137057 is a deficient number, since it is larger than the sum of its proper divisors (8038343).

191137057 is a wasteful number, since it uses less digits than its factorization.

191137057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48275.

The product of its (nonzero) digits is 6615, while the sum is 34.

The square root of 191137057 is about 13825.2326201044. The cubic root of 191137057 is about 576.0342389385.

The spelling of 191137057 in words is "one hundred ninety-one million, one hundred thirty-seven thousand, fifty-seven".