870063281 has 4 divisors (see below), whose sum is σ = 921243492. Its totient is φ = 818883072.

The previous prime is 870063263. The next prime is 870063283. The reversal of 870063281 is 182360078.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 363093025 + 506970256 = 19055^2 + 22516^2 .

It is a cyclic number.

It is not a de Polignac number, because 870063281 - 2¹⁸ = 869801137 is a prime.

It is a super-2 number, since 2×870063281² = 1514020225888969922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870063283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25590080 + ... + 25590113.

It is an arithmetic number, because the mean of its divisors is an integer number (230310873).

Almost surely, 2^870063281 is an apocalyptic number.

It is an amenable number.

870063281 is a deficient number, since it is larger than the sum of its proper divisors (51180211).

870063281 is a wasteful number, since it uses less digits than its factorization.

870063281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51180210.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 870063281 is about 29496.8351014138. The cubic root of 870063281 is about 954.6634161951.

The spelling of 870063281 in words is "eight hundred seventy million, sixty-three thousand, two hundred eighty-one".