999953161 has 2 divisors, whose sum is σ = 999953162. Its totient is φ = 999953160.

The previous prime is 999953113. The next prime is 999953167. The reversal of 999953161 is 161359999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976187536 + 23765625 = 31244^2 + 4875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999953161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999953099 and 999953108.

It is not a weakly prime, because it can be changed into another prime (999953167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499976580 + 499976581.

It is an arithmetic number, because the mean of its divisors is an integer number (499976581).

Almost surely, 2^999953161 is an apocalyptic number.

It is an amenable number.

999953161 is a deficient number, since it is larger than the sum of its proper divisors (1).

999953161 is an equidigital number, since it uses as much as digits as its factorization.

999953161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 590490, while the sum is 52.

The square root of 999953161 is about 31622.0360033948. The cubic root of 999953161 is about 999.9843867562.

The spelling of 999953161 in words is "nine hundred ninety-nine million, nine hundred fifty-three thousand, one hundred sixty-one".