427911687 has 32 divisors (see below), whose sum is σ = 728322560. Its totient is φ = 243233280.

The previous prime is 427911683. The next prime is 427911689. The reversal of 427911687 is 786119724.

It is a happy number.

It is not a de Polignac number, because 427911687 - 2² = 427911683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427911683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30612 + ... + 42342.

It is an arithmetic number, because the mean of its divisors is an integer number (22760080).

Almost surely, 2^427911687 is an apocalyptic number.

427911687 is a deficient number, since it is larger than the sum of its proper divisors (300410873).

427911687 is a wasteful number, since it uses less digits than its factorization.

427911687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11940 (or 11934 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 427911687 is about 20686.0263704753. The cubic root of 427911687 is about 753.5603676316.

The spelling of 427911687 in words is "four hundred twenty-seven million, nine hundred eleven thousand, six hundred eighty-seven".