191000086349 has 8 divisors (see below), whose sum is σ = 202280840568. Its totient is φ = 179724382720.

The previous prime is 191000086313. The next prime is 191000086367. The reversal of 191000086349 is 943680000191.

It can be written as a sum of positive squares in 4 ways, for example, as 108476033449 + 82524052900 = 329357^2 + 287270^2 .

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 191000086349 - 2³² = 186705119053 is a prime.

It is a super-2 number, since 2×191000086349² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191000086649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184642 + ... + 1336179.

It is an arithmetic number, because the mean of its divisors is an integer number (25285105071).

Almost surely, 2^191000086349 is an apocalyptic number.

It is an amenable number.

191000086349 is a deficient number, since it is larger than the sum of its proper divisors (11280754219).

191000086349 is a wasteful number, since it uses less digits than its factorization.

191000086349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525295.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 191000086349 in words is "one hundred ninety-one billion, eighty-six thousand, three hundred forty-nine".