487990191 has 8 divisors (see below), whose sum is σ = 700703920. Its totient is φ = 300301632.

The previous prime is 487990147. The next prime is 487990193. The reversal of 487990191 is 191099784.

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

It is not a de Polignac number, because 487990191 - 2¹³ = 487981999 is a prime.

It is the 22091-st Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 487990191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487990193) by changing a digit.

It is a nontrivial repunit in base 22090.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6256246 + ... + 6256323.

It is an arithmetic number, because the mean of its divisors is an integer number (87587990).

Almost surely, 2^487990191 is an apocalyptic number.

487990191 is a deficient number, since it is larger than the sum of its proper divisors (212713729).

487990191 is a wasteful number, since it uses less digits than its factorization.

487990191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12512585.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 487990191 is about 22090.5000169756. The cubic root of 487990191 is about 787.2941615713.

The spelling of 487990191 in words is "four hundred eighty-seven million, nine hundred ninety thousand, one hundred ninety-one".