191030 has 16 divisors (see below), whose sum is σ = 393120. Its totient is φ = 65472.

The previous prime is 191027. The next prime is 191033. The reversal of 191030 is 30191.

It is an interprime number because it is at equal distance from previous prime (191027) and next prime (191033).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 190996 and 191014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191033) 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, 1295 + ... + 1434.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2¹⁹¹⁰³⁰ is an apocalyptic number.

191030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191030 is an abundant number, since it is smaller than the sum of its proper divisors (202090).

It is a weird number, because it is abundant, but not a pseudoperfect number.

191030 is a wasteful number, since it uses less digits than its factorization.

191030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 191030 is about 437.0697884778. The cubic root of 191030 is about 57.5926672121.

The spelling of 191030 in words is "one hundred ninety-one thousand, thirty".