999913573 has 2 divisors, whose sum is σ = 999913574. Its totient is φ = 999913572.

The previous prime is 999913559. The next prime is 999913583. The reversal of 999913573 is 375319999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 639179524 + 360734049 = 25282^2 + 18993^2 .

It is a cyclic number.

It is not a de Polignac number, because 999913573 - 2²⁹ = 463042661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999913553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499956786 + 499956787.

It is an arithmetic number, because the mean of its divisors is an integer number (499956787).

Almost surely, 2^999913573 is an apocalyptic number.

It is an amenable number.

999913573 is a deficient number, since it is larger than the sum of its proper divisors (1).

999913573 is an equidigital number, since it uses as much as digits as its factorization.

999913573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2066715, while the sum is 55.

The square root of 999913573 is about 31621.4100412995. The cubic root of 999913573 is about 999.9711901700.

The spelling of 999913573 in words is "nine hundred ninety-nine million, nine hundred thirteen thousand, five hundred seventy-three".