434431987 has 6 divisors (see below), whose sum is σ = 477516284. Its totient is φ = 394938060.

The previous prime is 434431961. The next prime is 434431993. The reversal of 434431987 is 789134434.

It is not a de Polignac number, because 434431987 - 2¹⁹ = 433907699 is a prime.

It is a super-3 number, since 3×434431987³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (434491987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1795053 + ... + 1795294.

Almost surely, 2^434431987 is an apocalyptic number.

434431987 is a deficient number, since it is larger than the sum of its proper divisors (43084297).

434431987 is a wasteful number, since it uses less digits than its factorization.

434431987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590369 (or 3590358 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 434431987 is about 20843.0320970822. The cubic root of 434431987 is about 757.3685464291.

The spelling of 434431987 in words is "four hundred thirty-four million, four hundred thirty-one thousand, nine hundred eighty-seven".