71023013 has 4 divisors (see below), whose sum is σ = 71149728. Its totient is φ = 70896300.

The previous prime is 71023003. The next prime is 71023019. The reversal of 71023013 is 31032017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71023013 - 2⁴ = 71022997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71022982 and 71023000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71023019) 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, 62513 + ... + 63638.

It is an arithmetic number, because the mean of its divisors is an integer number (17787432).

Almost surely, 2^71023013 is an apocalyptic number.

It is an amenable number.

71023013 is a deficient number, since it is larger than the sum of its proper divisors (126715).

71023013 is a wasteful number, since it uses less digits than its factorization.

71023013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126714.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 71023013 is about 8427.5152328548. The cubic root of 71023013 is about 414.1265084376.

The spelling of 71023013 in words is "seventy-one million, twenty-three thousand, thirteen".