99603381 has 4 divisors (see below), whose sum is σ = 132804512. Its totient is φ = 66402252.

The previous prime is 99603379. The next prime is 99603389. The reversal of 99603381 is 18330699.

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.

It is not a de Polignac number, because 99603381 - 2¹ = 99603379 is a prime.

It is a super-2 number, since 2×99603381² = 19841667013262322, 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 (99603389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16600561 + ... + 16600566.

It is an arithmetic number, because the mean of its divisors is an integer number (33201128).

Almost surely, 2^99603381 is an apocalyptic number.

It is an amenable number.

99603381 is a deficient number, since it is larger than the sum of its proper divisors (33201131).

99603381 is a wasteful number, since it uses less digits than its factorization.

99603381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33201130.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 99603381 is about 9980.1493475799. The cubic root of 99603381 is about 463.5444228476.

The spelling of 99603381 in words is "ninety-nine million, six hundred three thousand, three hundred eighty-one".