999575657 has 2 divisors, whose sum is σ = 999575658. Its totient is φ = 999575656.

The previous prime is 999575651. The next prime is 999575663. The reversal of 999575657 is 756575999.

It is a balanced prime because it is at equal distance from previous prime (999575651) and next prime (999575663).

It can be written as a sum of positive squares in only one way, i.e., 863713321 + 135862336 = 29389^2 + 11656^2 .

It is a cyclic number.

It is not a de Polignac number, because 999575657 - 2⁶ = 999575593 is a prime.

It is a super-3 number, since 3×999575657³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 999575657.

It is not a weakly prime, because it can be changed into another prime (999575651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499787828 + 499787829.

It is an arithmetic number, because the mean of its divisors is an integer number (499787829).

Almost surely, 2^999575657 is an apocalyptic number.

It is an amenable number.

999575657 is a deficient number, since it is larger than the sum of its proper divisors (1).

999575657 is an equidigital number, since it uses as much as digits as its factorization.

999575657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26790750, while the sum is 62.

The square root of 999575657 is about 31616.0664378097. The cubic root of 999575657 is about 999.8585323212.

The spelling of 999575657 in words is "nine hundred ninety-nine million, five hundred seventy-five thousand, six hundred fifty-seven".