870312397 has 2 divisors, whose sum is σ = 870312398. Its totient is φ = 870312396.

The previous prime is 870312337. The next prime is 870312407. The reversal of 870312397 is 793213078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578210116 + 292102281 = 24046^2 + 17091^2 .

It is a cyclic number.

It is not a de Polignac number, because 870312397 - 2¹¹ = 870310349 is a prime.

It is equal to p_44569084 and since 870312397 and 44569084 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870312337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435156198 + 435156199.

It is an arithmetic number, because the mean of its divisors is an integer number (435156199).

Almost surely, 2^870312397 is an apocalyptic number.

It is an amenable number.

870312397 is a deficient number, since it is larger than the sum of its proper divisors (1).

870312397 is an equidigital number, since it uses as much as digits as its factorization.

870312397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 870312397 is about 29501.0575573148. The cubic root of 870312397 is about 954.7545203875.

The spelling of 870312397 in words is "eight hundred seventy million, three hundred twelve thousand, three hundred ninety-seven".