487999991 has 8 divisors (see below), whose sum is σ = 508772880. Its totient is φ = 467655552.

The previous prime is 487999979. The next prime is 488000017. The reversal of 487999991 is 199999784.

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 487999991 - 2¹⁰ = 487998967 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 (487999961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104786 + ... + 109343.

It is an arithmetic number, because the mean of its divisors is an integer number (63596610).

Almost surely, 2^487999991 is an apocalyptic number.

487999991 is a deficient number, since it is larger than the sum of its proper divisors (20772889).

487999991 is a wasteful number, since it uses less digits than its factorization.

487999991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214225.

The product of its digits is 13226976, while the sum is 65.

The square root of 487999991 is about 22090.7218306691. The cubic root of 487999991 is about 787.2994317805.

The spelling of 487999991 in words is "four hundred eighty-seven million, nine hundred ninety-nine thousand, nine hundred ninety-one".