191056730 has 8 divisors (see below), whose sum is σ = 343902132. Its totient is φ = 76422688.

The previous prime is 191056717. The next prime is 191056741. The reversal of 191056730 is 37650191.

It can be written as a sum of positive squares in 2 ways, for example, as 189585361 + 1471369 = 13769^2 + 1213^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9552827 + ... + 9552846.

Almost surely, 2^191056730 is an apocalyptic number.

191056730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191056730 is a deficient number, since it is larger than the sum of its proper divisors (152845402).

191056730 is a wasteful number, since it uses less digits than its factorization.

191056730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19105680.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 191056730 is about 13822.3272280756. The cubic root of 191056730 is about 575.9535331761.

The spelling of 191056730 in words is "one hundred ninety-one million, fifty-six thousand, seven hundred thirty".