71951413 has 4 divisors (see below), whose sum is σ = 71971020. Its totient is φ = 71931808.

The previous prime is 71951393. The next prime is 71951431. The reversal of 71951413 is 31415917.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35070084 + 36881329 = 5922^2 + 6073^2 .

It is a cyclic number.

It is not a de Polignac number, because 71951413 - 2⁵ = 71951381 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 (71951443) 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, 2470 + ... + 12247.

It is an arithmetic number, because the mean of its divisors is an integer number (17992755).

Almost surely, 2^71951413 is an apocalyptic number.

It is an amenable number.

71951413 is a deficient number, since it is larger than the sum of its proper divisors (19607).

71951413 is a wasteful number, since it uses less digits than its factorization.

71951413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19606.

The product of its digits is 3780, while the sum is 31.

The square root of 71951413 is about 8482.4178746393. The cubic root of 71951413 is about 415.9231648189.

The spelling of 71951413 in words is "seventy-one million, nine hundred fifty-one thousand, four hundred thirteen".