87198220807 has 2 divisors, whose sum is σ = 87198220808. Its totient is φ = 87198220806.

The previous prime is 87198220789. The next prime is 87198220927. The reversal of 87198220807 is 70802289178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87198220807 - 2¹⁵ = 87198188039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87198220607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43599110403 + 43599110404.

It is an arithmetic number, because the mean of its divisors is an integer number (43599110404).

Almost surely, 2^87198220807 is an apocalyptic number.

87198220807 is a deficient number, since it is larger than the sum of its proper divisors (1).

87198220807 is an equidigital number, since it uses as much as digits as its factorization.

87198220807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 52.

The spelling of 87198220807 in words is "eighty-seven billion, one hundred ninety-eight million, two hundred twenty thousand, eight hundred seven".