873655613 has 2 divisors, whose sum is σ = 873655614. Its totient is φ = 873655612.

The previous prime is 873655589. The next prime is 873655631. The reversal of 873655613 is 316556378.

Together with next prime (873655631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 852523204 + 21132409 = 29198^2 + 4597^2 .

It is a cyclic number.

It is not a de Polignac number, because 873655613 - 2⁸ = 873655357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873652613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436827806 + 436827807.

It is an arithmetic number, because the mean of its divisors is an integer number (436827807).

Almost surely, 2^873655613 is an apocalyptic number.

It is an amenable number.

873655613 is a deficient number, since it is larger than the sum of its proper divisors (1).

873655613 is an equidigital number, since it uses as much as digits as its factorization.

873655613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 873655613 is about 29557.6658922859. The cubic root of 873655613 is about 955.9754889026.

The spelling of 873655613 in words is "eight hundred seventy-three million, six hundred fifty-five thousand, six hundred thirteen".