191312830 has 8 divisors (see below), whose sum is σ = 344363112. Its totient is φ = 76525128.

The previous prime is 191312777. The next prime is 191312833. The reversal of 191312830 is 38213191.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191312833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9565632 + ... + 9565651.

It is an arithmetic number, because the mean of its divisors is an integer number (43045389).

Almost surely, 2^191312830 is an apocalyptic number.

191312830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191312830 is a deficient number, since it is larger than the sum of its proper divisors (153050282).

191312830 is a wasteful number, since it uses less digits than its factorization.

191312830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19131290.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 191312830 is about 13831.5881228440. The cubic root of 191312830 is about 576.2107619115.

The spelling of 191312830 in words is "one hundred ninety-one million, three hundred twelve thousand, eight hundred thirty".