98587813 has 4 divisors (see below), whose sum is σ = 99835840. Its totient is φ = 97339788.

The previous prime is 98587799. The next prime is 98587823. The reversal of 98587813 is 31878589.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31878589 = 73 ⋅436693.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98587813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98587823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623895 + ... + 624052.

It is an arithmetic number, because the mean of its divisors is an integer number (24958960).

Almost surely, 2^98587813 is an apocalyptic number.

It is an amenable number.

98587813 is a deficient number, since it is larger than the sum of its proper divisors (1248027).

98587813 is a wasteful number, since it uses less digits than its factorization.

98587813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248026.

The product of its digits is 483840, while the sum is 49.

The square root of 98587813 is about 9929.1395901156. The cubic root of 98587813 is about 461.9635863306.

It can be divided in two parts, 9858 and 7813, that added together give a palindrome (17671).

The spelling of 98587813 in words is "ninety-eight million, five hundred eighty-seven thousand, eight hundred thirteen".