70809986 has 12 divisors (see below), whose sum is σ = 115014402. Its totient is φ = 32681376.

The previous prime is 70809953. The next prime is 70810001. The reversal of 70809986 is 68990807.

It can be written as a sum of positive squares in 3 ways, for example, as 20839225 + 49970761 = 4565^2 + 7069^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 70809986.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 104411 + ... + 105086.

Almost surely, 2^70809986 is an apocalyptic number.

70809986 is a deficient number, since it is larger than the sum of its proper divisors (44204416).

70809986 is a wasteful number, since it uses less digits than its factorization.

70809986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209525 (or 209512 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 70809986 is about 8414.8669627036. The cubic root of 70809986 is about 413.7120489830.

The spelling of 70809986 in words is "seventy million, eight hundred nine thousand, nine hundred eighty-six".