70278889 has 4 divisors (see below), whose sum is σ = 70295680. Its totient is φ = 70262100.

The previous prime is 70278877. The next prime is 70278907. The reversal of 70278889 is 98887207.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 70278889 - 2¹¹ = 70276841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70278389) 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 3 ways as a sum of consecutive naturals, for example, 3532 + ... + 12370.

It is an arithmetic number, because the mean of its divisors is an integer number (17573920).

Almost surely, 2^70278889 is an apocalyptic number.

It is an amenable number.

70278889 is a deficient number, since it is larger than the sum of its proper divisors (16791).

70278889 is an equidigital number, since it uses as much as digits as its factorization.

70278889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16790.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 70278889 is about 8383.2505032356. The cubic root of 70278889 is about 412.6751290657.

The spelling of 70278889 in words is "seventy million, two hundred seventy-eight thousand, eight hundred eighty-nine".