10009999973 has 4 divisors (see below), whose sum is σ = 10026491520. Its totient is φ = 9993508428.

The previous prime is 10009999969. The next prime is 10009999991. The reversal of 10009999973 is 37999990001.

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: 37999990001 = 997 ⋅38114333.

It is a cyclic number.

It is not a de Polignac number, because 10009999973 - 2² = 10009999969 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 (10009990973) 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, 8244863 + ... + 8246076.

It is an arithmetic number, because the mean of its divisors is an integer number (2506622880).

Almost surely, 2^10009999973 is an apocalyptic number.

It is an amenable number.

10009999973 is a deficient number, since it is larger than the sum of its proper divisors (16491547).

10009999973 is an equidigital number, since it uses as much as digits as its factorization.

10009999973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16491546.

The product of its (nonzero) digits is 1240029, while the sum is 56.

The spelling of 10009999973 in words is "ten billion, nine million, nine hundred ninety-nine thousand, nine hundred seventy-three".