431914991 has 4 divisors (see below), whose sum is σ = 435212184. Its totient is φ = 428617800.

The previous prime is 431914981. The next prime is 431915047. The reversal of 431914991 is 199419134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199419134 = 2 ⋅99709567.

It is a cyclic number.

It is not a de Polignac number, because 431914991 - 2⁶ = 431914927 is a prime.

It is a super-4 number, since 4×431914991⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431914961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1648400 + ... + 1648661.

It is an arithmetic number, because the mean of its divisors is an integer number (108803046).

Almost surely, 2^431914991 is an apocalyptic number.

431914991 is a deficient number, since it is larger than the sum of its proper divisors (3297193).

431914991 is a wasteful number, since it uses less digits than its factorization.

431914991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297192.

The product of its digits is 34992, while the sum is 41.

The square root of 431914991 is about 20782.5645915031. The cubic root of 431914991 is about 755.9030412079.

The spelling of 431914991 in words is "four hundred thirty-one million, nine hundred fourteen thousand, nine hundred ninety-one".