870309061 has 2 divisors, whose sum is σ = 870309062. Its totient is φ = 870309060.

The previous prime is 870309047. The next prime is 870309071. The reversal of 870309061 is 160903078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660233025 + 210076036 = 25695^2 + 14494^2 .

It is a cyclic number.

It is not a de Polignac number, because 870309061 - 2¹¹ = 870307013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870309071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435154530 + 435154531.

It is an arithmetic number, because the mean of its divisors is an integer number (435154531).

Almost surely, 2^870309061 is an apocalyptic number.

It is an amenable number.

870309061 is a deficient number, since it is larger than the sum of its proper divisors (1).

870309061 is an equidigital number, since it uses as much as digits as its factorization.

870309061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 870309061 is about 29501.0010169147. The cubic root of 870309061 is about 954.7533004941.

The spelling of 870309061 in words is "eight hundred seventy million, three hundred nine thousand, sixty-one".