487640069 has 4 divisors (see below), whose sum is σ = 557302944. Its totient is φ = 417977196.

The previous prime is 487640051. The next prime is 487640077. The reversal of 487640069 is 960046784.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 487640069 - 2²⁴ = 470862853 is a prime.

It is a super-2 number, since 2×487640069² = 475585673788649522, which contains 22 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 (487640029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34831427 + ... + 34831440.

It is an arithmetic number, because the mean of its divisors is an integer number (139325736).

Almost surely, 2^487640069 is an apocalyptic number.

It is an amenable number.

487640069 is a deficient number, since it is larger than the sum of its proper divisors (69662875).

487640069 is an equidigital number, since it uses as much as digits as its factorization.

487640069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69662874.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 487640069 is about 22082.5738762491. The cubic root of 487640069 is about 787.1058278973.

The spelling of 487640069 in words is "four hundred eighty-seven million, six hundred forty thousand, sixty-nine".