870403 has 2 divisors, whose sum is σ = 870404. Its totient is φ = 870402.

The previous prime is 870391. The next prime is 870407. The reversal of 870403 is 304078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870403 - 2¹⁷ = 739331 is a prime.

It is not a weakly prime, because it can be changed into another prime (870407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435201 + 435202.

It is an arithmetic number, because the mean of its divisors is an integer number (435202).

2⁸⁷⁰⁴⁰³ is an apocalyptic number.

870403 is a deficient number, since it is larger than the sum of its proper divisors (1).

870403 is an equidigital number, since it uses as much as digits as its factorization.

870403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 870403 is about 932.9539109731. The cubic root of 870403 is about 95.4787650492.

The spelling of 870403 in words is "eight hundred seventy thousand, four hundred three".