87761567 has 2 divisors, whose sum is σ = 87761568. Its totient is φ = 87761566.

The previous prime is 87761543. The next prime is 87761591. The reversal of 87761567 is 76516778.

It is a balanced prime because it is at equal distance from previous prime (87761543) and next prime (87761591).

It is a cyclic number.

It is not a de Polignac number, because 87761567 - 2⁶ = 87761503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87761867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43880783 + 43880784.

It is an arithmetic number, because the mean of its divisors is an integer number (43880784).

Almost surely, 2^87761567 is an apocalyptic number.

87761567 is a deficient number, since it is larger than the sum of its proper divisors (1).

87761567 is an equidigital number, since it uses as much as digits as its factorization.

87761567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 47.

The square root of 87761567 is about 9368.1143780379. The cubic root of 87761567 is about 444.3939348688.

The spelling of 87761567 in words is "eighty-seven million, seven hundred sixty-one thousand, five hundred sixty-seven".