71668453 has 2 divisors, whose sum is σ = 71668454. Its totient is φ = 71668452.

The previous prime is 71668433. The next prime is 71668511. The reversal of 71668453 is 35486617.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39212644 + 32455809 = 6262^2 + 5697^2 .

It is a cyclic number.

It is not a de Polignac number, because 71668453 - 2⁹ = 71667941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71668423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35834226 + 35834227.

It is an arithmetic number, because the mean of its divisors is an integer number (35834227).

Almost surely, 2^71668453 is an apocalyptic number.

It is an amenable number.

71668453 is a deficient number, since it is larger than the sum of its proper divisors (1).

71668453 is an equidigital number, since it uses as much as digits as its factorization.

71668453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 71668453 is about 8465.7222373522. The cubic root of 71668453 is about 415.3772212473.

It can be divided in two parts, 716 and 68453, that added together give a square (69169 = 263²).

The spelling of 71668453 in words is "seventy-one million, six hundred sixty-eight thousand, four hundred fifty-three".