98621391 has 32 divisors (see below), whose sum is σ = 149932800. Its totient is φ = 57169440.

The previous prime is 98621371. The next prime is 98621399. The reversal of 98621391 is 19312689.

It is not a de Polignac number, because 98621391 - 2¹³ = 98613199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98621399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1671520 + ... + 1671578.

It is an arithmetic number, because the mean of its divisors is an integer number (4685400).

Almost surely, 2^98621391 is an apocalyptic number.

98621391 is a deficient number, since it is larger than the sum of its proper divisors (51311409).

98621391 is an equidigital number, since it uses as much as digits as its factorization.

98621391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 110 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 98621391 is about 9930.8303278225. The cubic root of 98621391 is about 462.0160270672.

The spelling of 98621391 in words is "ninety-eight million, six hundred twenty-one thousand, three hundred ninety-one".