1002012073 has 6 divisors (see below), whose sum is σ = 1006385534. Its totient is φ = 997657536.

The previous prime is 1002012071. The next prime is 1002012131. The reversal of 1002012073 is 3702102001.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 39275289 + 962736784 = 6267^2 + 31028^2 .

It is not a de Polignac number, because 1002012073 - 2¹ = 1002012071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002012071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45061 + ... + 63517.

Almost surely, 2^1002012073 is an apocalyptic number.

It is an amenable number.

1002012073 is a deficient number, since it is larger than the sum of its proper divisors (4373461).

1002012073 is an frugal number, since it uses more digits than its factorization.

1002012073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18923 (or 18690 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 1002012073 is about 31654.5742824003. The cubic root of 1002012073 is about 1000.6702416757.

Adding to 1002012073 its reverse (3702102001), we get a palindrome (4704114074).

The spelling of 1002012073 in words is "one billion, two million, twelve thousand, seventy-three".