999000061 has 2 divisors, whose sum is σ = 999000062. Its totient is φ = 999000060.

The previous prime is 999000029. The next prime is 999000071. The reversal of 999000061 is 160000999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994203961 + 4796100 = 31531^2 + 2190^2 .

It is a cyclic number.

It is not a de Polignac number, because 999000061 - 2⁵ = 999000029 is a prime.

It is a super-2 number, since 2×999000061² = 1996002243756007442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 998999990 and 999000026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999000011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499500030 + 499500031.

It is an arithmetic number, because the mean of its divisors is an integer number (499500031).

Almost surely, 2^999000061 is an apocalyptic number.

It is an amenable number.

999000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

999000061 is an equidigital number, since it uses as much as digits as its factorization.

999000061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 999000061 is about 31606.9622235355. The cubic root of 999000061 is about 999.6665758407. Note that the first 3 decimals are identical.

The spelling of 999000061 in words is "nine hundred ninety-nine million, sixty-one", and thus it is an aban number.