422453987 has 4 divisors (see below), whose sum is σ = 422495160. Its totient is φ = 422412816.

The previous prime is 422453971. The next prime is 422453989. The reversal of 422453987 is 789354224.

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 422453987 - 2⁴ = 422453971 is a prime.

It is a super-2 number, since 2×422453987² = 356934742264392338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422453989) 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, 8564 + ... + 30302.

It is an arithmetic number, because the mean of its divisors is an integer number (105623790).

Almost surely, 2^422453987 is an apocalyptic number.

422453987 is a deficient number, since it is larger than the sum of its proper divisors (41173).

422453987 is a wasteful number, since it uses less digits than its factorization.

422453987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41172.

The product of its digits is 483840, while the sum is 44.

The square root of 422453987 is about 20553.6854846035. The cubic root of 422453987 is about 750.3429465670.

The spelling of 422453987 in words is "four hundred twenty-two million, four hundred fifty-three thousand, nine hundred eighty-seven".