98972281 has 4 divisors (see below), whose sum is σ = 99015552. Its totient is φ = 98929012.

The previous prime is 98972267. The next prime is 98972297. The reversal of 98972281 is 18227989.

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: 18227989 = 13 ⋅1402153.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98972281 is a prime.

It is a super-2 number, since 2×98972281² = 19591024812685922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98972201) 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, 18001 + ... + 22846.

It is an arithmetic number, because the mean of its divisors is an integer number (24753888).

Almost surely, 2^98972281 is an apocalyptic number.

It is an amenable number.

98972281 is a deficient number, since it is larger than the sum of its proper divisors (43271).

98972281 is a wasteful number, since it uses less digits than its factorization.

98972281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43270.

The product of its digits is 145152, while the sum is 46.

The square root of 98972281 is about 9948.4813413908. The cubic root of 98972281 is about 462.5633218390.

The spelling of 98972281 in words is "ninety-eight million, nine hundred seventy-two thousand, two hundred eighty-one".