1319493997 has 8 divisors (see below), whose sum is σ = 1378511640. Its totient is φ = 1261377600.

The previous prime is 1319493971. The next prime is 1319494003. The reversal of 1319493997 is 7993949131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 304816681 + 1014677316 = 17459^2 + 31854^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1319493997 - 2⁷ = 1319493869 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 (1319493397) 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 7 ways as a sum of consecutive naturals, for example, 222318 + ... + 228175.

It is an arithmetic number, because the mean of its divisors is an integer number (172313955).

Almost surely, 2^1319493997 is an apocalyptic number.

It is an amenable number.

1319493997 is a deficient number, since it is larger than the sum of its proper divisors (59017643).

1319493997 is a wasteful number, since it uses less digits than its factorization.

1319493997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450623.

The product of its digits is 1653372, while the sum is 55.

The square root of 1319493997 is about 36324.8399445889. The cubic root of 1319493997 is about 1096.8211244626.

The spelling of 1319493997 in words is "one billion, three hundred nineteen million, four hundred ninety-three thousand, nine hundred ninety-seven".