87617279 has 2 divisors, whose sum is σ = 87617280. Its totient is φ = 87617278.

The previous prime is 87617267. The next prime is 87617293. The reversal of 87617279 is 97271678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87617279 - 2⁴ = 87617263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87617249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43808639 + 43808640.

It is an arithmetic number, because the mean of its divisors is an integer number (43808640).

Almost surely, 2^87617279 is an apocalyptic number.

87617279 is a deficient number, since it is larger than the sum of its proper divisors (1).

87617279 is an equidigital number, since it uses as much as digits as its factorization.

87617279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 87617279 is about 9360.4101940033. The cubic root of 87617279 is about 444.1502599266.

The spelling of 87617279 in words is "eighty-seven million, six hundred seventeen thousand, two hundred seventy-nine".