70871747 has 4 divisors (see below), whose sum is σ = 70892040. Its totient is φ = 70851456.

The previous prime is 70871743. The next prime is 70871753. The reversal of 70871747 is 74717807.

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 70871747 - 2² = 70871743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70871743) 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, 3422 + ... + 12387.

It is an arithmetic number, because the mean of its divisors is an integer number (17723010).

Almost surely, 2^70871747 is an apocalyptic number.

70871747 is a deficient number, since it is larger than the sum of its proper divisors (20293).

70871747 is a wasteful number, since it uses less digits than its factorization.

70871747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20292.

The product of its (nonzero) digits is 76832, while the sum is 41.

The square root of 70871747 is about 8418.5359178422. The cubic root of 70871747 is about 413.8322949456.

The spelling of 70871747 in words is "seventy million, eight hundred seventy-one thousand, seven hundred forty-seven".