98039643491 has 2 divisors, whose sum is σ = 98039643492. Its totient is φ = 98039643490.

The previous prime is 98039643473. The next prime is 98039643523. The reversal of 98039643491 is 19434693089.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98039643491 is a prime.

It is a super-2 number, since 2×98039643491² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (98039645491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49019821745 + 49019821746.

It is an arithmetic number, because the mean of its divisors is an integer number (49019821746).

Almost surely, 2^98039643491 is an apocalyptic number.

98039643491 is a deficient number, since it is larger than the sum of its proper divisors (1).

98039643491 is an equidigital number, since it uses as much as digits as its factorization.

98039643491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 56.

The spelling of 98039643491 in words is "ninety-eight billion, thirty-nine million, six hundred forty-three thousand, four hundred ninety-one".