98765432191 has 2 divisors, whose sum is σ = 98765432192. Its totient is φ = 98765432190.

The previous prime is 98765432177. The next prime is 98765432201. The reversal of 98765432191 is 19123456789.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 98765432191 - 2⁷ = 98765432063 is a prime.

It is a super-2 number, since 2×98765432191² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98765432291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49382716095 + 49382716096.

It is an arithmetic number, because the mean of its divisors is an integer number (49382716096).

Almost surely, 2^98765432191 is an apocalyptic number.

98765432191 is a deficient number, since it is larger than the sum of its proper divisors (1).

98765432191 is an equidigital number, since it uses as much as digits as its factorization.

98765432191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 55.

The spelling of 98765432191 in words is "ninety-eight billion, seven hundred sixty-five million, four hundred thirty-two thousand, one hundred ninety-one".