487097991 has 12 divisors (see below), whose sum is σ = 744973632. Its totient is φ = 305630016.

The previous prime is 487097987. The next prime is 487098019. The reversal of 487097991 is 199790784.

487097991 is a `hidden beast` number, since 487 + 0 + 9 + 79 + 91 = 666.

It is not a de Polignac number, because 487097991 - 2² = 487097987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487097911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1591671 + ... + 1591976.

It is an arithmetic number, because the mean of its divisors is an integer number (62081136).

Almost surely, 2^487097991 is an apocalyptic number.

487097991 is a deficient number, since it is larger than the sum of its proper divisors (257875641).

487097991 is a wasteful number, since it uses less digits than its factorization.

487097991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183670 (or 3183667 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 487097991 is about 22070.2965770739. The cubic root of 487097991 is about 786.8140615041.

The spelling of 487097991 in words is "four hundred eighty-seven million, ninety-seven thousand, nine hundred ninety-one".