31428719593 has 8 divisors (see below), whose sum is σ = 31855584200. Its totient is φ = 31004373888.

The previous prime is 31428719549. The next prime is 31428719687. The reversal of 31428719593 is 39591782413.

It can be written as a sum of positive squares in 4 ways, for example, as 12793193449 + 18635526144 = 113107^2 + 136512^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31428719593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31428719593.

It is not an unprimeable number, because it can be changed into a prime (31428719503) 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, 604596 + ... + 654517.

It is an arithmetic number, because the mean of its divisors is an integer number (3981948025).

Almost surely, 2^31428719593 is an apocalyptic number.

It is an amenable number.

31428719593 is a deficient number, since it is larger than the sum of its proper divisors (426864607).

31428719593 is a wasteful number, since it uses less digits than its factorization.

31428719593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259451.

The product of its digits is 1632960, while the sum is 52.

The spelling of 31428719593 in words is "thirty-one billion, four hundred twenty-eight million, seven hundred nineteen thousand, five hundred ninety-three".