70345681 has 16 divisors (see below), whose sum is σ = 82612224. Its totient is φ = 58653504.

The previous prime is 70345679. The next prime is 70345687. The reversal of 70345681 is 18654307.

It is not a de Polignac number, because 70345681 - 2¹ = 70345679 is a prime.

It is a super-2 number, since 2×70345681² = 9897029670707522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70345687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46371 + ... + 47863.

It is an arithmetic number, because the mean of its divisors is an integer number (5163264).

Almost surely, 2^70345681 is an apocalyptic number.

It is an amenable number.

70345681 is a deficient number, since it is larger than the sum of its proper divisors (12266543).

70345681 is a wasteful number, since it uses less digits than its factorization.

70345681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 70345681 is about 8387.2332148331. The cubic root of 70345681 is about 412.8058210856.

Adding to 70345681 its reverse (18654307), we get a palindrome (88999988).

The spelling of 70345681 in words is "seventy million, three hundred forty-five thousand, six hundred eighty-one".