70889581 has 8 divisors (see below), whose sum is σ = 81561600. Its totient is φ = 60353808.

The previous prime is 70889573. The next prime is 70889593. The reversal of 70889581 is 18598807.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70889581 - 2³ = 70889573 is a prime.

It is a super-2 number, since 2×70889581² = 10050665388711122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70889501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32941 + ... + 35026.

It is an arithmetic number, because the mean of its divisors is an integer number (10195200).

Almost surely, 2^70889581 is an apocalyptic number.

It is an amenable number.

70889581 is a deficient number, since it is larger than the sum of its proper divisors (10672019).

70889581 is a wasteful number, since it uses less digits than its factorization.

70889581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68123.

The product of its (nonzero) digits is 161280, while the sum is 46.

The square root of 70889581 is about 8419.5950615217. The cubic root of 70889581 is about 413.8670039634.

The spelling of 70889581 in words is "seventy million, eight hundred eighty-nine thousand, five hundred eighty-one".