70189681 has 4 divisors (see below), whose sum is σ = 70212592. Its totient is φ = 70166772.

The previous prime is 70189627. The next prime is 70189687. The reversal of 70189681 is 18698107.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70189681 is a prime.

It is a super-2 number, since 2×70189681² = 9853182637763522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70189687) 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, 5991 + ... + 13276.

It is an arithmetic number, because the mean of its divisors is an integer number (17553148).

Almost surely, 2^70189681 is an apocalyptic number.

It is an amenable number.

70189681 is a deficient number, since it is larger than the sum of its proper divisors (22911).

70189681 is a wasteful number, since it uses less digits than its factorization.

70189681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22910.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 70189681 is about 8377.9282045145. The cubic root of 70189681 is about 412.5004464029.

The spelling of 70189681 in words is "seventy million, one hundred eighty-nine thousand, six hundred eighty-one".