870961849 has 2 divisors, whose sum is σ = 870961850. Its totient is φ = 870961848.

The previous prime is 870961829. The next prime is 870961873. The reversal of 870961849 is 948169078.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771061824 + 99900025 = 27768^2 + 9995^2 .

It is a cyclic number.

It is not a de Polignac number, because 870961849 - 2¹¹ = 870959801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 870961796 and 870961805.

It is not a weakly prime, because it can be changed into another prime (870961829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435480924 + 435480925.

It is an arithmetic number, because the mean of its divisors is an integer number (435480925).

Almost surely, 2^870961849 is an apocalyptic number.

It is an amenable number.

870961849 is a deficient number, since it is larger than the sum of its proper divisors (1).

870961849 is an equidigital number, since it uses as much as digits as its factorization.

870961849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 870961849 is about 29512.0627710094. The cubic root of 870961849 is about 954.9919497142.

The spelling of 870961849 in words is "eight hundred seventy million, nine hundred sixty-one thousand, eight hundred forty-nine".