869180069 has 2 divisors, whose sum is σ = 869180070. Its totient is φ = 869180068.

The previous prime is 869179981. The next prime is 869180087. The reversal of 869180069 is 960081968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 759663844 + 109516225 = 27562^2 + 10465^2 .

It is a cyclic number.

It is not a de Polignac number, because 869180069 - 2⁸ = 869179813 is a prime.

It is a super-2 number, since 2×869180069² = 1510947984693689522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869180089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434590034 + 434590035.

It is an arithmetic number, because the mean of its divisors is an integer number (434590035).

Almost surely, 2^869180069 is an apocalyptic number.

It is an amenable number.

869180069 is a deficient number, since it is larger than the sum of its proper divisors (1).

869180069 is an equidigital number, since it uses as much as digits as its factorization.

869180069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 869180069 is about 29481.8599989892. The cubic root of 869180069 is about 954.3402766149.

The spelling of 869180069 in words is "eight hundred sixty-nine million, one hundred eighty thousand, sixty-nine".