870512213 has 2 divisors, whose sum is σ = 870512214. Its totient is φ = 870512212.

The previous prime is 870512207. The next prime is 870512219. The reversal of 870512213 is 312215078.

It is a balanced prime because it is at equal distance from previous prime (870512207) and next prime (870512219).

It can be written as a sum of positive squares in only one way, i.e., 726464209 + 144048004 = 26953^2 + 12002^2 .

It is a cyclic number.

It is not a de Polignac number, because 870512213 - 2⁴ = 870512197 is a prime.

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 (870512219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435256106 + 435256107.

It is an arithmetic number, because the mean of its divisors is an integer number (435256107).

Almost surely, 2^870512213 is an apocalyptic number.

It is an amenable number.

870512213 is a deficient number, since it is larger than the sum of its proper divisors (1).

870512213 is an equidigital number, since it uses as much as digits as its factorization.

870512213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 870512213 is about 29504.4439534115. The cubic root of 870512213 is about 954.8275825169.

The spelling of 870512213 in words is "eight hundred seventy million, five hundred twelve thousand, two hundred thirteen".