70681481 has 4 divisors (see below), whose sum is σ = 76118532. Its totient is φ = 65244432.

The previous prime is 70681477. The next prime is 70681487. The reversal of 70681481 is 18418607.

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 36060025 + 34621456 = 6005^2 + 5884^2 .

It is a cyclic number.

It is not a de Polignac number, because 70681481 - 2² = 70681477 is a prime.

It is a super-2 number, since 2×70681481² = 9991743512706722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70681487) 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 in 3 ways as a sum of consecutive naturals, for example, 2718506 + ... + 2718531.

It is an arithmetic number, because the mean of its divisors is an integer number (19029633).

Almost surely, 2^70681481 is an apocalyptic number.

It is an amenable number.

70681481 is a deficient number, since it is larger than the sum of its proper divisors (5437051).

70681481 is a wasteful number, since it uses less digits than its factorization.

70681481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5437050.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 70681481 is about 8407.2279022279. The cubic root of 70681481 is about 413.4616311027.

The spelling of 70681481 in words is "seventy million, six hundred eighty-one thousand, four hundred eighty-one".