87220000091 has 16 divisors (see below), whose sum is σ = 104079350784. Its totient is φ = 71464577184.

The previous prime is 87220000073. The next prime is 87220000093. The reversal of 87220000091 is 19000002278.

It is a happy number.

It is not a de Polignac number, because 87220000091 - 2¹⁸ = 87219737947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87220000093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87506 + ... + 426728.

It is an arithmetic number, because the mean of its divisors is an integer number (6504959424).

Almost surely, 2^87220000091 is an apocalyptic number.

87220000091 is a deficient number, since it is larger than the sum of its proper divisors (16859350693).

87220000091 is a wasteful number, since it uses less digits than its factorization.

87220000091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340850.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 87220000091 in words is "eighty-seven billion, two hundred twenty million, ninety-one", and thus it is an aban number.