71870613 has 32 divisors (see below), whose sum is σ = 103420800. Its totient is φ = 44303616.

The previous prime is 71870573. The next prime is 71870633. The reversal of 71870613 is 31607817.

It is not a de Polignac number, because 71870613 - 2⁶ = 71870549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71870633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267043 + ... + 267311.

It is an arithmetic number, because the mean of its divisors is an integer number (3231900).

Almost surely, 2^71870613 is an apocalyptic number.

It is an amenable number.

71870613 is a deficient number, since it is larger than the sum of its proper divisors (31550187).

71870613 is a wasteful number, since it uses less digits than its factorization.

71870613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 71870613 is about 8477.6537438138. The cubic root of 71870613 is about 415.7674153670.

The spelling of 71870613 in words is "seventy-one million, eight hundred seventy thousand, six hundred thirteen".