870625213 has 2 divisors, whose sum is σ = 870625214. Its totient is φ = 870625212.

The previous prime is 870625159. The next prime is 870625241. The reversal of 870625213 is 312526078.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514246329 + 356378884 = 22677^2 + 18878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-870625213 is a prime.

It is a super-2 number, since 2×870625213² = 1515976523022590738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870625013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435312606 + 435312607.

It is an arithmetic number, because the mean of its divisors is an integer number (435312607).

Almost surely, 2^870625213 is an apocalyptic number.

It is an amenable number.

870625213 is a deficient number, since it is larger than the sum of its proper divisors (1).

870625213 is an equidigital number, since it uses as much as digits as its factorization.

870625213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 870625213 is about 29506.3588570328. The cubic root of 870625213 is about 954.8688956837.

The spelling of 870625213 in words is "eight hundred seventy million, six hundred twenty-five thousand, two hundred thirteen".