71230297639 has 4 divisors (see below), whose sum is σ = 71567882200. Its totient is φ = 70892713080.

The previous prime is 71230297637. The next prime is 71230297667. The reversal of 71230297639 is 93679203217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93679203217 = 83 ⋅1128665099.

It is a cyclic number.

It is not a de Polignac number, because 71230297639 - 2¹ = 71230297637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71230297592 and 71230297601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71230297637) 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, 168791964 + ... + 168792385.

It is an arithmetic number, because the mean of its divisors is an integer number (17891970550).

Almost surely, 2^71230297639 is an apocalyptic number.

71230297639 is a deficient number, since it is larger than the sum of its proper divisors (337584561).

71230297639 is a wasteful number, since it uses less digits than its factorization.

71230297639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337584560.

The product of its (nonzero) digits is 857304, while the sum is 49.

The spelling of 71230297639 in words is "seventy-one billion, two hundred thirty million, two hundred ninety-seven thousand, six hundred thirty-nine".