70327681 has 4 divisors (see below), whose sum is σ = 70414164. Its totient is φ = 70241200.

The previous prime is 70327637. The next prime is 70327687. The reversal of 70327681 is 18672307.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10342656 + 59985025 = 3216^2 + 7745^2 .

It is a cyclic number.

It is not a de Polignac number, because 70327681 - 2²¹ = 68230529 is a prime.

It is a super-2 number, since 2×70327681² = 9891965429675522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70327687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42010 + ... + 43651.

It is an arithmetic number, because the mean of its divisors is an integer number (17603541).

Almost surely, 2^70327681 is an apocalyptic number.

It is an amenable number.

70327681 is a deficient number, since it is larger than the sum of its proper divisors (86483).

70327681 is an equidigital number, since it uses as much as digits as its factorization.

70327681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86482.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 70327681 is about 8386.1600867143. The cubic root of 70327681 is about 412.7706086010.

Adding to 70327681 its reverse (18672307), we get a palindrome (88999988).

The spelling of 70327681 in words is "seventy million, three hundred twenty-seven thousand, six hundred eighty-one".