870409289 has 4 divisors (see below), whose sum is σ = 898487040. Its totient is φ = 842331540.

The previous prime is 870409273. The next prime is 870409307. The reversal of 870409289 is 982904078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 870409289 - 2⁴ = 870409273 is a prime.

It is a super-2 number, since 2×870409289² = 1515224660754971042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870409229) 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, 14038829 + ... + 14038890.

It is an arithmetic number, because the mean of its divisors is an integer number (224621760).

Almost surely, 2^870409289 is an apocalyptic number.

It is an amenable number.

870409289 is a deficient number, since it is larger than the sum of its proper divisors (28077751).

870409289 is a wasteful number, since it uses less digits than its factorization.

870409289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28077750.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 870409289 is about 29502.6996900284. The cubic root of 870409289 is about 954.7899500572.

The spelling of 870409289 in words is "eight hundred seventy million, four hundred nine thousand, two hundred eighty-nine".