99997673 has 4 divisors (see below), whose sum is σ = 100294740. Its totient is φ = 99700608.

The previous prime is 99997669. The next prime is 99997679. The reversal of 99997673 is 37679999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37679999 = 7 ⋅5382857.

It can be written as a sum of positive squares in 2 ways, for example, as 30558784 + 69438889 = 5528^2 + 8333^2 .

It is a cyclic number.

It is not a de Polignac number, because 99997673 - 2² = 99997669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99997679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148028 + ... + 148701.

It is an arithmetic number, because the mean of its divisors is an integer number (25073685).

Almost surely, 2^99997673 is an apocalyptic number.

It is an amenable number.

99997673 is a deficient number, since it is larger than the sum of its proper divisors (297067).

99997673 is a wasteful number, since it uses less digits than its factorization.

99997673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297066.

The product of its digits is 5786802, while the sum is 59.

The square root of 99997673 is about 9999.8836493231. The cubic root of 99997673 is about 464.1552830076.

The spelling of 99997673 in words is "ninety-nine million, nine hundred ninety-seven thousand, six hundred seventy-three".