99097381 has 4 divisors (see below), whose sum is σ = 99141952. Its totient is φ = 99052812.

The previous prime is 99097373. The next prime is 99097387. The reversal of 99097381 is 18379099.

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: 18379099 = 19 ⋅967321.

It is a cyclic number.

It is not a de Polignac number, because 99097381 - 2³ = 99097373 is a prime.

It is a super-2 number, since 2×99097381² = 19640581842118322, 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 (99097387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18765 + ... + 23458.

It is an arithmetic number, because the mean of its divisors is an integer number (24785488).

Almost surely, 2^99097381 is an apocalyptic number.

It is an amenable number.

99097381 is a deficient number, since it is larger than the sum of its proper divisors (44571).

99097381 is a wasteful number, since it uses less digits than its factorization.

99097381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44570.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 99097381 is about 9954.7667476441. The cubic root of 99097381 is about 462.7581316285.

The spelling of 99097381 in words is "ninety-nine million, ninety-seven thousand, three hundred eighty-one".