1012319999 has 4 divisors (see below), whose sum is σ = 1056333936. Its totient is φ = 968306064.

The previous prime is 1012319977. The next prime is 1012320011. The reversal of 1012319999 is 9999132101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9999132101 = 7 ⋅1428447443.

It is a cyclic number.

It is not a de Polignac number, because 1012319999 - 2¹² = 1012315903 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 (1012319599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22006934 + ... + 22006979.

It is an arithmetic number, because the mean of its divisors is an integer number (264083484).

Almost surely, 2^1012319999 is an apocalyptic number.

1012319999 is a deficient number, since it is larger than the sum of its proper divisors (44013937).

1012319999 is an equidigital number, since it uses as much as digits as its factorization.

1012319999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44013936.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 1012319999 is about 31816.9765848360. The cubic root of 1012319999 is about 1004.0899161149.

The spelling of 1012319999 in words is "one billion, twelve million, three hundred nineteen thousand, nine hundred ninety-nine".