191339064 has 64 divisors (see below), whose sum is σ = 607430400. Its totient is φ = 54667872.

The previous prime is 191339041. The next prime is 191339117. The reversal of 191339064 is 460933191.

It is a super-2 number, since 2×191339064² = 73221274824792192, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61762 + ... + 64785.

It is an arithmetic number, because the mean of its divisors is an integer number (9491100).

Almost surely, 2^191339064 is an apocalyptic number.

191339064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

191339064 is an abundant number, since it is smaller than the sum of its proper divisors (416091336).

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

191339064 is a wasteful number, since it uses less digits than its factorization.

191339064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126569 (or 126559 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 191339064 is about 13832.5364268452. The cubic root of 191339064 is about 576.2370985704.

The spelling of 191339064 in words is "one hundred ninety-one million, three hundred thirty-nine thousand, sixty-four".