870423 has 4 divisors (see below), whose sum is σ = 1160568. Its totient is φ = 580280.

The previous prime is 870413. The next prime is 870431. The reversal of 870423 is 324078.

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

It is a cyclic number.

It is not a de Polignac number, because 870423 - 2⁴ = 870407 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 870393 and 870402.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870423.

It is not an unprimeable number, because it can be changed into a prime (870403) 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, 145068 + ... + 145073.

It is an arithmetic number, because the mean of its divisors is an integer number (290142).

2⁸⁷⁰⁴²³ is an apocalyptic number.

870423 is a deficient number, since it is larger than the sum of its proper divisors (290145).

870423 is a wasteful number, since it uses less digits than its factorization.

870423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290144.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 870423 is about 932.9646295546. The cubic root of 870423 is about 95.4794963429.

The spelling of 870423 in words is "eight hundred seventy thousand, four hundred twenty-three".