70878823 has 4 divisors (see below), whose sum is σ = 71173168. Its totient is φ = 70584480.

The previous prime is 70878817. The next prime is 70878859. The reversal of 70878823 is 32887807.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 70878823 - 2¹⁷ = 70747751 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70878823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70878323) 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, 146811 + ... + 147292.

It is an arithmetic number, because the mean of its divisors is an integer number (17793292).

Almost surely, 2^70878823 is an apocalyptic number.

70878823 is a deficient number, since it is larger than the sum of its proper divisors (294345).

70878823 is a wasteful number, since it uses less digits than its factorization.

70878823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294344.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 70878823 is about 8418.9561704525. The cubic root of 70878823 is about 413.8460671468.

The spelling of 70878823 in words is "seventy million, eight hundred seventy-eight thousand, eight hundred twenty-three".