870431 has 2 divisors, whose sum is σ = 870432. Its totient is φ = 870430.

The previous prime is 870413. The next prime is 870433. The reversal of 870431 is 134078.

It is a happy number.

870431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (870413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870431 - 2⁶ = 870367 is a prime.

It is a super-2 number, since 2×870431² = 1515300251522, which contains 22 as substring.

Together with 870433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 870397 and 870406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435215 + 435216.

It is an arithmetic number, because the mean of its divisors is an integer number (435216).

2⁸⁷⁰⁴³¹ is an apocalyptic number.

870431 is a deficient number, since it is larger than the sum of its proper divisors (1).

870431 is an equidigital number, since it uses as much as digits as its factorization.

870431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 870431 is about 932.9689169528. The cubic root of 870431 is about 95.4797888572.

The spelling of 870431 in words is "eight hundred seventy thousand, four hundred thirty-one".