99206781673 has 8 divisors (see below), whose sum is σ = 100179169416. Its totient is φ = 98236051200.

The previous prime is 99206781649. The next prime is 99206781689. The reversal of 99206781673 is 37618760299.

It can be written as a sum of positive squares in 4 ways, for example, as 1446128784 + 97760652889 = 38028^2 + 312667^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99206781673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99206181673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293838 + ... + 533623.

It is an arithmetic number, because the mean of its divisors is an integer number (12522396177).

Almost surely, 2^99206781673 is an apocalyptic number.

It is an amenable number.

99206781673 is a deficient number, since it is larger than the sum of its proper divisors (972387743).

99206781673 is a wasteful number, since it uses less digits than its factorization.

99206781673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828635.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 99206781673 in words is "ninety-nine billion, two hundred six million, seven hundred eighty-one thousand, six hundred seventy-three".