870582749 has 2 divisors, whose sum is σ = 870582750. Its totient is φ = 870582748.

The previous prime is 870582721. The next prime is 870582751. The reversal of 870582749 is 947285078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 857025625 + 13557124 = 29275^2 + 3682^2 .

It is a cyclic number.

It is not a de Polignac number, because 870582749 - 2¹⁶ = 870517213 is a prime.

Together with 870582751, 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 = 870582697 and 870582706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870582719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435291374 + 435291375.

It is an arithmetic number, because the mean of its divisors is an integer number (435291375).

Almost surely, 2^870582749 is an apocalyptic number.

It is an amenable number.

870582749 is a deficient number, since it is larger than the sum of its proper divisors (1).

870582749 is an equidigital number, since it uses as much as digits as its factorization.

870582749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 870582749 is about 29505.6392745522. The cubic root of 870582749 is about 954.8533711267.

The spelling of 870582749 in words is "eight hundred seventy million, five hundred eighty-two thousand, seven hundred forty-nine".