191252071 has 8 divisors (see below), whose sum is σ = 202057920. Its totient is φ = 180727008.

The previous prime is 191252069. The next prime is 191252093. The reversal of 191252071 is 170252191.

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 191252071 - 2¹ = 191252069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191252471) 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, 68796 + ... + 71521.

It is an arithmetic number, because the mean of its divisors is an integer number (25257240).

Almost surely, 2^191252071 is an apocalyptic number.

191252071 is a deficient number, since it is larger than the sum of its proper divisors (10805849).

191252071 is a wasteful number, since it uses less digits than its factorization.

191252071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140393.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 191252071 is about 13829.3915628996. The cubic root of 191252071 is about 576.1497559027.

The spelling of 191252071 in words is "one hundred ninety-one million, two hundred fifty-two thousand, seventy-one".