71389407 has 4 divisors (see below), whose sum is σ = 95185880. Its totient is φ = 47592936.

The previous prime is 71389397. The next prime is 71389411. The reversal of 71389407 is 70498317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70498317 = 3 ⋅23499439.

It is not a de Polignac number, because 71389407 - 2⁶ = 71389343 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 (71384407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11898232 + ... + 11898237.

It is an arithmetic number, because the mean of its divisors is an integer number (23796470).

Almost surely, 2^71389407 is an apocalyptic number.

71389407 is a deficient number, since it is larger than the sum of its proper divisors (23796473).

71389407 is a wasteful number, since it uses less digits than its factorization.

71389407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23796472.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 71389407 is about 8449.2252307534. The cubic root of 71389407 is about 414.8374202279.

The spelling of 71389407 in words is "seventy-one million, three hundred eighty-nine thousand, four hundred seven".