190781149 has 8 divisors (see below), whose sum is σ = 205611392. Its totient is φ = 175973040.

The previous prime is 190781137. The next prime is 190781167. The reversal of 190781149 is 941187091.

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

It is a cyclic number.

It is not a de Polignac number, because 190781149 - 2⁵ = 190781117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190781119) 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, 15304 + ... + 24814.

It is an arithmetic number, because the mean of its divisors is an integer number (25701424).

Almost surely, 2^190781149 is an apocalyptic number.

It is an amenable number.

190781149 is a deficient number, since it is larger than the sum of its proper divisors (14830243).

190781149 is a wasteful number, since it uses less digits than its factorization.

190781149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11067.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 190781149 is about 13812.3549404148. The cubic root of 190781149 is about 575.6764806910.

The spelling of 190781149 in words is "one hundred ninety million, seven hundred eighty-one thousand, one hundred forty-nine".