190397081 has 8 divisors (see below), whose sum is σ = 229049280. Its totient is φ = 154608048.

The previous prime is 190397063. The next prime is 190397087. The reversal of 190397081 is 180793091.

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

It is not a de Polignac number, because 190397081 - 2⁶ = 190397017 is a prime.

It is a super-2 number, since 2×190397081² = 72502096906641122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190397087) 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, 715646 + ... + 715911.

It is an arithmetic number, because the mean of its divisors is an integer number (28631160).

Almost surely, 2^190397081 is an apocalyptic number.

It is an amenable number.

190397081 is a deficient number, since it is larger than the sum of its proper divisors (38652199).

190397081 is a wasteful number, since it uses less digits than its factorization.

190397081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431583.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 190397081 is about 13798.4448761446. Note that the first 3 decimals coincide. The cubic root of 190397081 is about 575.2899165586.

The spelling of 190397081 in words is "one hundred ninety million, three hundred ninety-seven thousand, eighty-one".