70739871 has 4 divisors (see below), whose sum is σ = 94319832. Its totient is φ = 47159912.

The previous prime is 70739863. The next prime is 70739891. The reversal of 70739871 is 17893707.

It is a happy number.

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 70739871 - 2³ = 70739863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70739891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11789976 + ... + 11789981.

It is an arithmetic number, because the mean of its divisors is an integer number (23579958).

Almost surely, 2^70739871 is an apocalyptic number.

70739871 is a deficient number, since it is larger than the sum of its proper divisors (23579961).

70739871 is a wasteful number, since it uses less digits than its factorization.

70739871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23579960.

The product of its (nonzero) digits is 74088, while the sum is 42.

The square root of 70739871 is about 8410.6997925262. The cubic root of 70739871 is about 413.5754533724.

The spelling of 70739871 in words is "seventy million, seven hundred thirty-nine thousand, eight hundred seventy-one".