771216071 has 2 divisors, whose sum is σ = 771216072. Its totient is φ = 771216070.

The previous prime is 771216031. The next prime is 771216119. The reversal of 771216071 is 170612177.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 771216071 - 2¹⁴ = 771199687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (771216001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385608035 + 385608036.

It is an arithmetic number, because the mean of its divisors is an integer number (385608036).

Almost surely, 2^771216071 is an apocalyptic number.

771216071 is a deficient number, since it is larger than the sum of its proper divisors (1).

771216071 is an equidigital number, since it uses as much as digits as its factorization.

771216071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4116, while the sum is 32.

The square root of 771216071 is about 27770.7772847646. Note that the first 3 decimals coincide. The cubic root of 771216071 is about 917.0479063175.

The spelling of 771216071 in words is "seven hundred seventy-one million, two hundred sixteen thousand, seventy-one".