99498581 has 24 divisors (see below), whose sum is σ = 124170624. Its totient is φ = 78062400.

The previous prime is 99498493. The next prime is 99498583. The reversal of 99498581 is 18589499.

It is not a de Polignac number, because 99498581 - 2¹⁰ = 99497557 is a prime.

It is a super-2 number, since 2×99498581² = 19799935242027122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99498583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178355 + ... + 178911.

It is an arithmetic number, because the mean of its divisors is an integer number (5173776).

Almost surely, 2^99498581 is an apocalyptic number.

99498581 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

99498581 is a deficient number, since it is larger than the sum of its proper divisors (24672043).

99498581 is a wasteful number, since it uses less digits than its factorization.

99498581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 728 counting only the distinct ones).

The product of its digits is 933120, while the sum is 53.

The square root of 99498581 is about 9974.8975433335. The cubic root of 99498581 is about 463.3817894678.

The spelling of 99498581 in words is "ninety-nine million, four hundred ninety-eight thousand, five hundred eighty-one".