70947983 has 4 divisors (see below), whose sum is σ = 71087880. Its totient is φ = 70808088.

The previous prime is 70947959. The next prime is 70947997. The reversal of 70947983 is 38974907.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38974907 = 3301 ⋅11807.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70947983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70947683) 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, 69185 + ... + 70202.

It is an arithmetic number, because the mean of its divisors is an integer number (17771970).

Almost surely, 2^70947983 is an apocalyptic number.

70947983 is a deficient number, since it is larger than the sum of its proper divisors (139897).

70947983 is a wasteful number, since it uses less digits than its factorization.

70947983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139896.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 70947983 is about 8423.0625665491. The cubic root of 70947983 is about 413.9806268016.

The spelling of 70947983 in words is "seventy million, nine hundred forty-seven thousand, nine hundred eighty-three".