87930247 has 2 divisors, whose sum is σ = 87930248. Its totient is φ = 87930246.

The previous prime is 87930217. The next prime is 87930253. The reversal of 87930247 is 74203978.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87930247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87930217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43965123 + 43965124.

It is an arithmetic number, because the mean of its divisors is an integer number (43965124).

Almost surely, 2^87930247 is an apocalyptic number.

87930247 is a deficient number, since it is larger than the sum of its proper divisors (1).

87930247 is an equidigital number, since it uses as much as digits as its factorization.

87930247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 87930247 is about 9377.1129352269. The cubic root of 87930247 is about 444.6784648647.

The spelling of 87930247 in words is "eighty-seven million, nine hundred thirty thousand, two hundred forty-seven".