190647381 has 8 divisors (see below), whose sum is σ = 254446720. Its totient is φ = 126973152.

The previous prime is 190647377. The next prime is 190647407. The reversal of 190647381 is 183746091.

190647381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 190647381 - 2² = 190647377 is a prime.

It is a super-2 number, since 2×190647381² = 72692847764318322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190647371) 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, 27661 + ... + 33858.

It is an arithmetic number, because the mean of its divisors is an integer number (31805840).

Almost surely, 2^190647381 is an apocalyptic number.

It is an amenable number.

190647381 is a deficient number, since it is larger than the sum of its proper divisors (63799339).

190647381 is a wasteful number, since it uses less digits than its factorization.

190647381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62555.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 190647381 is about 13807.5117599081. The cubic root of 190647381 is about 575.5419022364.

The spelling of 190647381 in words is "one hundred ninety million, six hundred forty-seven thousand, three hundred eighty-one".