431139939617 has 4 divisors (see below), whose sum is σ = 432500002836. Its totient is φ = 429779876400.

The previous prime is 431139939583. The next prime is 431139939653. The reversal of 431139939617 is 716939931134.

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 30835711201 + 400304228416 = 175601^2 + 632696^2 .

It is a cyclic number.

It is not a de Polignac number, because 431139939617 - 2⁶ = 431139939553 is a prime.

It is a super-2 number, since 2×431139939617² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431139939017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680031134 + ... + 680031767.

It is an arithmetic number, because the mean of its divisors is an integer number (108125000709).

Almost surely, 2^431139939617 is an apocalyptic number.

It is an amenable number.

431139939617 is a deficient number, since it is larger than the sum of its proper divisors (1360063219).

431139939617 is a wasteful number, since it uses less digits than its factorization.

431139939617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360063218.

The product of its digits is 3306744, while the sum is 56.

The spelling of 431139939617 in words is "four hundred thirty-one billion, one hundred thirty-nine million, nine hundred thirty-nine thousand, six hundred seventeen".