87955559 has 2 divisors, whose sum is σ = 87955560. Its totient is φ = 87955558.

The previous prime is 87955499. The next prime is 87955613. The reversal of 87955559 is 95555978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87955559 - 2⁸ = 87955303 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87955559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87955459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43977779 + 43977780.

It is an arithmetic number, because the mean of its divisors is an integer number (43977780).

Almost surely, 2^87955559 is an apocalyptic number.

87955559 is a deficient number, since it is larger than the sum of its proper divisors (1).

87955559 is an equidigital number, since it uses as much as digits as its factorization.

87955559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2835000, while the sum is 53.

The square root of 87955559 is about 9378.4625072557. The cubic root of 87955559 is about 444.7211298248.

The spelling of 87955559 in words is "eighty-seven million, nine hundred fifty-five thousand, five hundred fifty-nine".