70493971 has 4 divisors (see below), whose sum is σ = 74204200. Its totient is φ = 66783744.

The previous prime is 70493903. The next prime is 70493977. The reversal of 70493971 is 17939407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17939407 = 103 ⋅174169.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70493971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70493977) 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, 1855086 + ... + 1855123.

It is an arithmetic number, because the mean of its divisors is an integer number (18551050).

Almost surely, 2^70493971 is an apocalyptic number.

70493971 is a deficient number, since it is larger than the sum of its proper divisors (3710229).

70493971 is a wasteful number, since it uses less digits than its factorization.

70493971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710228.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 70493971 is about 8396.0687824719. The cubic root of 70493971 is about 413.0956849434.

The spelling of 70493971 in words is "seventy million, four hundred ninety-three thousand, nine hundred seventy-one".