1000561069 has 2 divisors, whose sum is σ = 1000561070. Its totient is φ = 1000561068.

The previous prime is 1000561063. The next prime is 1000561087. The reversal of 1000561069 is 9601650001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 985646025 + 14915044 = 31395^2 + 3862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000561069 is a prime.

It is a super-2 number, since 2×1000561069² = 2002244905596845522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000561063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500280534 + 500280535.

It is an arithmetic number, because the mean of its divisors is an integer number (500280535).

Almost surely, 2^1000561069 is an apocalyptic number.

It is an amenable number.

1000561069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000561069 is an equidigital number, since it uses as much as digits as its factorization.

1000561069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1000561069 is about 31631.6466375053. The cubic root of 1000561069 is about 1000.1869880333.

The spelling of 1000561069 in words is "one billion, five hundred sixty-one thousand, sixty-nine".