70019891 has 8 divisors (see below), whose sum is σ = 73517520. Its totient is φ = 66594528.

The previous prime is 70019869. The next prime is 70019897. The reversal of 70019891 is 19891007.

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 70019891 - 2¹⁰ = 70018867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70019897) 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, 16076 + ... + 19961.

It is an arithmetic number, because the mean of its divisors is an integer number (9189690).

Almost surely, 2^70019891 is an apocalyptic number.

70019891 is a deficient number, since it is larger than the sum of its proper divisors (3497629).

70019891 is a wasteful number, since it uses less digits than its factorization.

70019891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36133.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 70019891 is about 8367.7888955207. The cubic root of 70019891 is about 412.1675627058.

The spelling of 70019891 in words is "seventy million, nineteen thousand, eight hundred ninety-one".