431919997 has 4 divisors (see below), whose sum is σ = 446813820. Its totient is φ = 417026176.

The previous prime is 431919991. The next prime is 431920001. The reversal of 431919997 is 799919134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 307686681 + 124233316 = 17541^2 + 11146^2 .

It is a cyclic number.

It is not a de Polignac number, because 431919997 - 2¹¹ = 431917949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431919991) 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 3 ways as a sum of consecutive naturals, for example, 7446868 + ... + 7446925.

It is an arithmetic number, because the mean of its divisors is an integer number (111703455).

Almost surely, 2^431919997 is an apocalyptic number.

It is an amenable number.

431919997 is a deficient number, since it is larger than the sum of its proper divisors (14893823).

431919997 is a wasteful number, since it uses less digits than its factorization.

431919997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14893822.

The product of its digits is 551124, while the sum is 52.

The square root of 431919997 is about 20782.6850286482. The cubic root of 431919997 is about 755.9059615635.

The spelling of 431919997 in words is "four hundred thirty-one million, nine hundred nineteen thousand, nine hundred ninety-seven".