71379013 has 2 divisors, whose sum is σ = 71379014. Its totient is φ = 71379012.

The previous prime is 71378987. The next prime is 71379017. The reversal of 71379013 is 31097317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67930564 + 3448449 = 8242^2 + 1857^2 .

It is an emirp because it is prime and its reverse (31097317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71379013 is a prime.

It is equal to p_4194328 and since 71379013 and 4194328 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71379017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35689506 + 35689507.

It is an arithmetic number, because the mean of its divisors is an integer number (35689507).

Almost surely, 2^71379013 is an apocalyptic number.

It is an amenable number.

71379013 is a deficient number, since it is larger than the sum of its proper divisors (1).

71379013 is an equidigital number, since it uses as much as digits as its factorization.

71379013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 71379013 is about 8448.6101223811. The cubic root of 71379013 is about 414.8172863845.

The spelling of 71379013 in words is "seventy-one million, three hundred seventy-nine thousand, thirteen".