870000049 has 2 divisors, whose sum is σ = 870000050. Its totient is φ = 870000048.

The previous prime is 869999993. The next prime is 870000067. The reversal of 870000049 is 940000078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863948449 + 6051600 = 29393^2 + 2460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870000049 is a prime.

It is a super-3 number, since 3×870000049³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 869999981 and 870000026.

It is not a weakly prime, because it can be changed into another prime (870000149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435000024 + 435000025.

It is an arithmetic number, because the mean of its divisors is an integer number (435000025).

Almost surely, 2^870000049 is an apocalyptic number.

It is an amenable number.

870000049 is a deficient number, since it is larger than the sum of its proper divisors (1).

870000049 is an equidigital number, since it uses as much as digits as its factorization.

870000049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 870000049 is about 29495.7632381330. The cubic root of 870000049 is about 954.6402888584.

The spelling of 870000049 in words is "eight hundred seventy million, forty-nine", and thus it is an aban number.