87776071 has 2 divisors, whose sum is σ = 87776072. Its totient is φ = 87776070.

The previous prime is 87776063. The next prime is 87776081. The reversal of 87776071 is 17067778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87776071 - 2³ = 87776063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87776081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43888035 + 43888036.

It is an arithmetic number, because the mean of its divisors is an integer number (43888036).

Almost surely, 2^87776071 is an apocalyptic number.

87776071 is a deficient number, since it is larger than the sum of its proper divisors (1).

87776071 is an equidigital number, since it uses as much as digits as its factorization.

87776071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115248, while the sum is 43.

The square root of 87776071 is about 9368.8884612850. Note that the first 3 decimals coincide. The cubic root of 87776071 is about 444.4184145843.

The spelling of 87776071 in words is "eighty-seven million, seven hundred seventy-six thousand, seventy-one".