98309381 has 4 divisors (see below), whose sum is σ = 98331564. Its totient is φ = 98287200.

The previous prime is 98309359. The next prime is 98309437. The reversal of 98309381 is 18390389.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18390389 = 1697 ⋅10837.

It can be written as a sum of positive squares in 2 ways, for example, as 4800481 + 93508900 = 2191^2 + 9670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98309381 is a prime.

It is a super-2 number, since 2×98309381² = 19329468785206322, 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 (98309581) 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, 1910 + ... + 14151.

It is an arithmetic number, because the mean of its divisors is an integer number (24582891).

Almost surely, 2^98309381 is an apocalyptic number.

It is an amenable number.

98309381 is a deficient number, since it is larger than the sum of its proper divisors (22183).

98309381 is a wasteful number, since it uses less digits than its factorization.

98309381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22182.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 98309381 is about 9915.1087235592. The cubic root of 98309381 is about 461.5282832919.

The spelling of 98309381 in words is "ninety-eight million, three hundred nine thousand, three hundred eighty-one".