98819213557 has 2 divisors, whose sum is σ = 98819213558. Its totient is φ = 98819213556.

The previous prime is 98819213551. The next prime is 98819213593. The reversal of 98819213557 is 75531291889.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68774538001 + 30044675556 = 262249^2 + 173334^2 .

It is a cyclic number.

It is not a de Polignac number, because 98819213557 - 2²³ = 98810824949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98819213551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49409606778 + 49409606779.

It is an arithmetic number, because the mean of its divisors is an integer number (49409606779).

Almost surely, 2^98819213557 is an apocalyptic number.

It is an amenable number.

98819213557 is a deficient number, since it is larger than the sum of its proper divisors (1).

98819213557 is an equidigital number, since it uses as much as digits as its factorization.

98819213557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 58.

The spelling of 98819213557 in words is "ninety-eight billion, eight hundred nineteen million, two hundred thirteen thousand, five hundred fifty-seven".