7870670813 has 2 divisors, whose sum is σ = 7870670814. Its totient is φ = 7870670812.

The previous prime is 7870670783. The next prime is 7870670837. The reversal of 7870670813 is 3180760787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7722367129 + 148303684 = 87877^2 + 12178^2 .

It is a cyclic number.

It is not a de Polignac number, because 7870670813 - 2⁶ = 7870670749 is a prime.

It is a super-2 number, since 2×7870670813² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7870670513) 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 as a sum of consecutive naturals, namely, 3935335406 + 3935335407.

It is an arithmetic number, because the mean of its divisors is an integer number (3935335407).

Almost surely, 2^7870670813 is an apocalyptic number.

It is an amenable number.

7870670813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7870670813 is an equidigital number, since it uses as much as digits as its factorization.

7870670813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 7870670813 is about 88716.8011878246. The cubic root of 7870670813 is about 1989.1639639416.

The spelling of 7870670813 in words is "seven billion, eight hundred seventy million, six hundred seventy thousand, eight hundred thirteen".