1315921069 has 4 divisors (see below), whose sum is σ = 1325966400. Its totient is φ = 1305875740.

The previous prime is 1315921067. The next prime is 1315921111. The reversal of 1315921069 is 9601295131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9601295131 = 37 ⋅259494463.

It is a cyclic number.

It is not a de Polignac number, because 1315921069 - 2¹ = 1315921067 is a prime.

It is a super-2 number, since 2×1315921069² = 3463296519676205522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315921063) 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, 5022469 + ... + 5022730.

It is an arithmetic number, because the mean of its divisors is an integer number (331491600).

Almost surely, 2^1315921069 is an apocalyptic number.

It is an amenable number.

1315921069 is a deficient number, since it is larger than the sum of its proper divisors (10045331).

1315921069 is a wasteful number, since it uses less digits than its factorization.

1315921069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10045330.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 1315921069 is about 36275.6263763977. The cubic root of 1315921069 is about 1095.8302382052.

The spelling of 1315921069 in words is "one billion, three hundred fifteen million, nine hundred twenty-one thousand, sixty-nine".