487492991 has 4 divisors (see below), whose sum is σ = 491051472. Its totient is φ = 483934512.

The previous prime is 487492931. The next prime is 487493009. The reversal of 487492991 is 199294784.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-487492991 is a prime.

It is a super-3 number, since 3×487492991³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487492931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1779035 + ... + 1779308.

It is an arithmetic number, because the mean of its divisors is an integer number (122762868).

Almost surely, 2^487492991 is an apocalyptic number.

487492991 is a deficient number, since it is larger than the sum of its proper divisors (3558481).

487492991 is a wasteful number, since it uses less digits than its factorization.

487492991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558480.

The product of its digits is 1306368, while the sum is 53.

The square root of 487492991 is about 22079.2434426545. The cubic root of 487492991 is about 787.0266864710.

The spelling of 487492991 in words is "four hundred eighty-seven million, four hundred ninety-two thousand, nine hundred ninety-one".