191952381 has 8 divisors (see below), whose sum is σ = 256085824. Its totient is φ = 127893600.

The previous prime is 191952373. The next prime is 191952407. The reversal of 191952381 is 183259191.

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

It is not a de Polignac number, because 191952381 - 2³ = 191952373 is a prime.

It is a super-2 number, since 2×191952381² = 73691433143138322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191952331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12361 + ... + 23166.

It is an arithmetic number, because the mean of its divisors is an integer number (32010728).

Almost surely, 2^191952381 is an apocalyptic number.

It is an amenable number.

191952381 is a deficient number, since it is larger than the sum of its proper divisors (64133443).

191952381 is a wasteful number, since it uses less digits than its factorization.

191952381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37331.

The product of its digits is 19440, while the sum is 39.

The square root of 191952381 is about 13854.6880513420. The cubic root of 191952381 is about 576.8521307890.

The spelling of 191952381 in words is "one hundred ninety-one million, nine hundred fifty-two thousand, three hundred eighty-one".