71920853 has 2 divisors, whose sum is σ = 71920854. Its totient is φ = 71920852.

The previous prime is 71920843. The next prime is 71920861. The reversal of 71920853 is 35802917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41692849 + 30228004 = 6457^2 + 5498^2 .

It is a cyclic number.

It is not a de Polignac number, because 71920853 - 2¹⁰ = 71919829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71920813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35960426 + 35960427.

It is an arithmetic number, because the mean of its divisors is an integer number (35960427).

Almost surely, 2^71920853 is an apocalyptic number.

It is an amenable number.

71920853 is a deficient number, since it is larger than the sum of its proper divisors (1).

71920853 is an equidigital number, since it uses as much as digits as its factorization.

71920853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 71920853 is about 8480.6163101510. The cubic root of 71920853 is about 415.8642713178.

The spelling of 71920853 in words is "seventy-one million, nine hundred twenty thousand, eight hundred fifty-three".