99999773 has 2 divisors, whose sum is σ = 99999774. Its totient is φ = 99999772.

The previous prime is 99999721. The next prime is 99999787. The reversal of 99999773 is 37799999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80964004 + 19035769 = 8998^2 + 4363^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999773 - 2⁸ = 99999517 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99999703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999886 + 49999887.

It is an arithmetic number, because the mean of its divisors is an integer number (49999887).

Almost surely, 2^99999773 is an apocalyptic number.

It is an amenable number.

99999773 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999773 is an equidigital number, since it uses as much as digits as its factorization.

99999773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8680203, while the sum is 62.

The square root of 99999773 is about 9999.9886499936. The cubic root of 99999773 is about 464.1585321475.

The spelling of 99999773 in words is "ninety-nine million, nine hundred ninety-nine thousand, seven hundred seventy-three".