190716981 has 64 divisors (see below), whose sum is σ = 326860800. Its totient is φ = 96235776.

The previous prime is 190716979. The next prime is 190717013. The reversal of 190716981 is 189617091.

It is not a de Polignac number, because 190716981 - 2¹ = 190716979 is a prime.

It is a super-2 number, since 2×190716981² = 72745933683508722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190716901) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 797860 + ... + 798098.

It is an arithmetic number, because the mean of its divisors is an integer number (5107200).

Almost surely, 2^190716981 is an apocalyptic number.

It is an amenable number.

190716981 is a deficient number, since it is larger than the sum of its proper divisors (136143819).

190716981 is a wasteful number, since it uses less digits than its factorization.

190716981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378.

The product of its (nonzero) digits is 27216, while the sum is 42.

The square root of 190716981 is about 13810.0318971391. The cubic root of 190716981 is about 575.6119317722.

The spelling of 190716981 in words is "one hundred ninety million, seven hundred sixteen thousand, nine hundred eighty-one".