870173669 has 2 divisors, whose sum is σ = 870173670. Its totient is φ = 870173668.

The previous prime is 870173641. The next prime is 870173677. The reversal of 870173669 is 966371078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 830016100 + 40157569 = 28810^2 + 6337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870173669 is a prime.

It is a super-2 number, since 2×870173669² = 1514404428441843122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen 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 (870173699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435086834 + 435086835.

It is an arithmetic number, because the mean of its divisors is an integer number (435086835).

Almost surely, 2^870173669 is an apocalyptic number.

It is an amenable number.

870173669 is a deficient number, since it is larger than the sum of its proper divisors (1).

870173669 is an equidigital number, since it uses as much as digits as its factorization.

870173669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 870173669 is about 29498.7062258669. The cubic root of 870173669 is about 954.7037883271.

The spelling of 870173669 in words is "eight hundred seventy million, one hundred seventy-three thousand, six hundred sixty-nine".