425784987 has 24 divisors (see below), whose sum is σ = 628009200. Its totient is φ = 277887168.

The previous prime is 425784971. The next prime is 425784991. The reversal of 425784987 is 789487524.

It is a happy number.

It is not a de Polignac number, because 425784987 - 2⁴ = 425784971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (425784187) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337564 + ... + 338822.

It is an arithmetic number, because the mean of its divisors is an integer number (26167050).

Almost surely, 2^425784987 is an apocalyptic number.

425784987 is a deficient number, since it is larger than the sum of its proper divisors (202224213).

425784987 is a wasteful number, since it uses less digits than its factorization.

425784987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027 (or 2024 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 425784987 is about 20634.5580761983. The cubic root of 425784987 is about 752.3099077976.

The spelling of 425784987 in words is "four hundred twenty-five million, seven hundred eighty-four thousand, nine hundred eighty-seven".