70007857 has 2 divisors, whose sum is σ = 70007858. Its totient is φ = 70007856.

The previous prime is 70007851. The next prime is 70007891. The reversal of 70007857 is 75870007.

It is a happy number.

It is an a-pointer prime, because the next prime (70007891) can be obtained adding 70007857 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60279696 + 9728161 = 7764^2 + 3119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70007857 is a prime.

It is a super-2 number, since 2×70007857² = 9802200083464898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70007851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35003928 + 35003929.

It is an arithmetic number, because the mean of its divisors is an integer number (35003929).

Almost surely, 2^70007857 is an apocalyptic number.

It is an amenable number.

70007857 is a deficient number, since it is larger than the sum of its proper divisors (1).

70007857 is an equidigital number, since it uses as much as digits as its factorization.

70007857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13720, while the sum is 34.

The square root of 70007857 is about 8367.0697977249. The cubic root of 70007857 is about 412.1439488986.

The spelling of 70007857 in words is "seventy million, seven thousand, eight hundred fifty-seven".