71622461 has 2 divisors, whose sum is σ = 71622462. Its totient is φ = 71622460.

The previous prime is 71622413. The next prime is 71622469. The reversal of 71622461 is 16422617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 219961 = 8450^2 + 469^2 .

It is an emirp because it is prime and its reverse (16422617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71622461 - 2¹⁰ = 71621437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71622469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35811230 + 35811231.

It is an arithmetic number, because the mean of its divisors is an integer number (35811231).

Almost surely, 2^71622461 is an apocalyptic number.

It is an amenable number.

71622461 is a deficient number, since it is larger than the sum of its proper divisors (1).

71622461 is an equidigital number, since it uses as much as digits as its factorization.

71622461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 71622461 is about 8463.0054354230. The cubic root of 71622461 is about 415.2883484989.

The spelling of 71622461 in words is "seventy-one million, six hundred twenty-two thousand, four hundred sixty-one".