71980877 has 2 divisors, whose sum is σ = 71980878. Its totient is φ = 71980876.

The previous prime is 71980849. The next prime is 71980891. The reversal of 71980877 is 77808917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69989956 + 1990921 = 8366^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 71980877 - 2¹² = 71976781 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71980897) 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, 35990438 + 35990439.

It is an arithmetic number, because the mean of its divisors is an integer number (35990439).

Almost surely, 2^71980877 is an apocalyptic number.

It is an amenable number.

71980877 is a deficient number, since it is larger than the sum of its proper divisors (1).

71980877 is an equidigital number, since it uses as much as digits as its factorization.

71980877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 47.

The square root of 71980877 is about 8484.1544658263. The cubic root of 71980877 is about 415.9799303835.

The spelling of 71980877 in words is "seventy-one million, nine hundred eighty thousand, eight hundred seventy-seven".