8422987 has 4 divisors (see below), whose sum is σ = 8430256. Its totient is φ = 8415720.

The previous prime is 8422949. The next prime is 8422993. The reversal of 8422987 is 7892248.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8422987 - 2⁷ = 8422859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8422927) 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, 1464 + ... + 4357.

It is an arithmetic number, because the mean of its divisors is an integer number (2107564).

Almost surely, 2^8422987 is an apocalyptic number.

8422987 is a deficient number, since it is larger than the sum of its proper divisors (7269).

8422987 is a wasteful number, since it uses less digits than its factorization.

8422987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7268.

The product of its digits is 64512, while the sum is 40.

The square root of 8422987 is about 2902.2382741601. The cubic root of 8422987 is about 203.4645302777.

It can be divided in two parts, 8422 and 987, that added together give a square (9409 = 97²).

The spelling of 8422987 in words is "eight million, four hundred twenty-two thousand, nine hundred eighty-seven".