424631987 has 8 divisors (see below), whose sum is σ = 457593360. Its totient is φ = 391713120.

The previous prime is 424631983. The next prime is 424632037. The reversal of 424631987 is 789136424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 424631987 - 2² = 424631983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424631983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11912 + ... + 31482.

It is an arithmetic number, because the mean of its divisors is an integer number (57199170).

Almost surely, 2^424631987 is an apocalyptic number.

424631987 is a deficient number, since it is larger than the sum of its proper divisors (32961373).

424631987 is a wasteful number, since it uses less digits than its factorization.

424631987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21253.

The product of its digits is 290304, while the sum is 44.

The square root of 424631987 is about 20606.6005687498. The cubic root of 424631987 is about 751.6302239996.

The spelling of 424631987 in words is "four hundred twenty-four million, six hundred thirty-one thousand, nine hundred eighty-seven".