842766487 has 4 divisors (see below), whose sum is σ = 846446920. Its totient is φ = 839086056.

The previous prime is 842766469. The next prime is 842766511. The reversal of 842766487 is 784667248.

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-842766487 is a prime.

It is a super-2 number, since 2×842766487² = 1420510703220642338, 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 (845766487) 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, 1839873 + ... + 1840330.

It is an arithmetic number, because the mean of its divisors is an integer number (211611730).

Almost surely, 2^842766487 is an apocalyptic number.

842766487 is a deficient number, since it is larger than the sum of its proper divisors (3680433).

842766487 is a wasteful number, since it uses less digits than its factorization.

842766487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680432.

The product of its digits is 3612672, while the sum is 52.

The square root of 842766487 is about 29030.4406959316. The cubic root of 842766487 is about 944.5734894914.

The spelling of 842766487 in words is "eight hundred forty-two million, seven hundred sixty-six thousand, four hundred eighty-seven".