319397339199481 has 3 divisors (see below), whose sum is σ = 319397357071173. Its totient is φ = 319397321327790.

The previous prime is 319397339199473. The next prime is 319397339199493. The reversal of 319397339199481 is 184991933793913.

The square root of 319397339199481 is 17871691.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 319397339199481 - 2³ = 319397339199473 is a prime.

It is a super-2 number, since 2×319397339199481² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319397339199451) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8935846 + ... + 26807536.

It is an arithmetic number, because the mean of its divisors is an integer number (106465785690391).

Almost surely, 2^{319397339199481} is an apocalyptic number.

319397339199481 is the 17871691-st square number.

319397339199481 is the 8935846-th centered octagonal number.

It is an amenable number.

319397339199481 is a deficient number, since it is larger than the sum of its proper divisors (17871692).

319397339199481 is an frugal number, since it uses more digits than its factorization.

319397339199481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35743382 (or 17871691 counting only the distinct ones).

The product of its digits is 1071385056, while the sum is 79.

The spelling of 319397339199481 in words is "three hundred nineteen trillion, three hundred ninety-seven billion, three hundred thirty-nine million, one hundred ninety-nine thousand, four hundred eighty-one".