191012700 has 288 divisors, whose sum is σ = 639959040. Its totient is φ = 43718400.

The previous prime is 191012693. The next prime is 191012713. The reversal of 191012700 is 7210191.

It is a super-2 number, since 2×191012700² = 72971703122580000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4064077 + ... + 4064123.

It is an arithmetic number, because the mean of its divisors is an integer number (2222080).

Almost surely, 2^191012700 is an apocalyptic number.

191012700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191012700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319979520).

191012700 is an abundant number, since it is smaller than the sum of its proper divisors (448946340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191012700 is a wasteful number, since it uses less digits than its factorization.

191012700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 191012700 is about 13820.7344233221. The cubic root of 191012700 is about 575.9092859650.

Adding to 191012700 its reverse (7210191), we get a palindrome (198222891).

The spelling of 191012700 in words is "one hundred ninety-one million, twelve thousand, seven hundred".