191493612 has 48 divisors (see below), whose sum is σ = 513592800. Its totient is φ = 61629120.

The previous prime is 191493581. The next prime is 191493619. The reversal of 191493612 is 216394191.

It is a happy number.

191493612 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (191493619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27439 + ... + 33702.

It is an arithmetic number, because the mean of its divisors is an integer number (10699850).

Almost surely, 2^191493612 is an apocalyptic number.

191493612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191493612 is an abundant number, since it is smaller than the sum of its proper divisors (322099188).

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

191493612 is a wasteful number, since it uses less digits than its factorization.

191493612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61183 (or 61175 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 191493612 is about 13838.1216933513. The cubic root of 191493612 is about 576.3922025040.

The spelling of 191493612 in words is "one hundred ninety-one million, four hundred ninety-three thousand, six hundred twelve".