1012019999 has 4 divisors (see below), whose sum is σ = 1012131120. Its totient is φ = 1011908880.

The previous prime is 1012019993. The next prime is 1012020019. The reversal of 1012019999 is 9999102101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012019999 - 2¹² = 1012015903 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 (1012019993) 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, 40547 + ... + 60564.

It is an arithmetic number, because the mean of its divisors is an integer number (253032780).

Almost surely, 2^1012019999 is an apocalyptic number.

1012019999 is a deficient number, since it is larger than the sum of its proper divisors (111121).

1012019999 is a wasteful number, since it uses less digits than its factorization.

1012019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111120.

The product of its (nonzero) digits is 13122, while the sum is 41.

The square root of 1012019999 is about 31812.2617712102. The cubic root of 1012019999 is about 1003.9907193076.

The spelling of 1012019999 in words is "one billion, twelve million, nineteen thousand, nine hundred ninety-nine".