87798071 has 2 divisors, whose sum is σ = 87798072. Its totient is φ = 87798070.

The previous prime is 87798041. The next prime is 87798089. The reversal of 87798071 is 17089778.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87798071 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87798001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43899035 + 43899036.

It is an arithmetic number, because the mean of its divisors is an integer number (43899036).

Almost surely, 2^87798071 is an apocalyptic number.

87798071 is a deficient number, since it is larger than the sum of its proper divisors (1).

87798071 is an equidigital number, since it uses as much as digits as its factorization.

87798071 is an evil number, because the sum of its binary digits is even.

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

The square root of 87798071 is about 9370.0624864512. The cubic root of 87798071 is about 444.4555408318.

The spelling of 87798071 in words is "eighty-seven million, seven hundred ninety-eight thousand, seventy-one".