999729553 has 2 divisors, whose sum is σ = 999729554. Its totient is φ = 999729552.

The previous prime is 999729503. The next prime is 999729583. The reversal of 999729553 is 355927999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999634689 + 94864 = 31617^2 + 308^2 .

It is a cyclic number.

It is not a de Polignac number, because 999729553 - 2¹³ = 999721361 is a prime.

It is not a weakly prime, because it can be changed into another prime (999729503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499864776 + 499864777.

It is an arithmetic number, because the mean of its divisors is an integer number (499864777).

Almost surely, 2^999729553 is an apocalyptic number.

It is an amenable number.

999729553 is a deficient number, since it is larger than the sum of its proper divisors (1).

999729553 is an equidigital number, since it uses as much as digits as its factorization.

999729553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6889050, while the sum is 58.

The square root of 999729553 is about 31618.5001699954. The cubic root of 999729553 is about 999.9098428719.

The spelling of 999729553 in words is "nine hundred ninety-nine million, seven hundred twenty-nine thousand, five hundred fifty-three".