98357190781 has 2 divisors, whose sum is σ = 98357190782. Its totient is φ = 98357190780.

The previous prime is 98357190779. The next prime is 98357190797. The reversal of 98357190781 is 18709175389.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71882972100 + 26474218681 = 268110^2 + 162709^2 .

It is an emirp because it is prime and its reverse (18709175389) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98357190781 - 2¹ = 98357190779 is a prime.

It is a super-2 number, since 2×98357190781² (a number of 23 digits) contains 22 as substring.

Together with 98357190779, it forms a pair of twin primes.

It is the 313620-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98357194781) by changing a digit.

It is a nontrivial repunit in base 313619.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49178595390 + 49178595391.

It is an arithmetic number, because the mean of its divisors is an integer number (49178595391).

Almost surely, 2^98357190781 is an apocalyptic number.

It is an amenable number.

98357190781 is a deficient number, since it is larger than the sum of its proper divisors (1).

98357190781 is an equidigital number, since it uses as much as digits as its factorization.

98357190781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 58.

The spelling of 98357190781 in words is "ninety-eight billion, three hundred fifty-seven million, one hundred ninety thousand, seven hundred eighty-one".