870661813 has 8 divisors (see below), whose sum is σ = 1006223040. Its totient is φ = 737895840.

The previous prime is 870661811. The next prime is 870661819. The reversal of 870661813 is 318166078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 870661813 - 2¹ = 870661811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870661811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 698143 + ... + 699388.

It is an arithmetic number, because the mean of its divisors is an integer number (125777880).

Almost surely, 2^870661813 is an apocalyptic number.

It is an amenable number.

870661813 is a deficient number, since it is larger than the sum of its proper divisors (135561227).

870661813 is a wasteful number, since it uses less digits than its factorization.

870661813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397627.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 870661813 is about 29506.9790558098. The cubic root of 870661813 is about 954.8822759960.

The spelling of 870661813 in words is "eight hundred seventy million, six hundred sixty-one thousand, eight hundred thirteen".