99290881 has 4 divisors (see below), whose sum is σ = 99337392. Its totient is φ = 99244372.

The previous prime is 99290879. The next prime is 99290899. The reversal of 99290881 is 18809299.

It is a happy number.

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: 18809299 = 2267 ⋅8297.

It is a cyclic number.

It is not a de Polignac number, because 99290881 - 2¹ = 99290879 is a prime.

It is a super-2 number, since 2×99290881² = 19717358099512322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99293881) 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, 19891 + ... + 24376.

It is an arithmetic number, because the mean of its divisors is an integer number (24834348).

Almost surely, 2^99290881 is an apocalyptic number.

It is an amenable number.

99290881 is a deficient number, since it is larger than the sum of its proper divisors (46511).

99290881 is a wasteful number, since it uses less digits than its factorization.

99290881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46510.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 99290881 is about 9964.4809699251. The cubic root of 99290881 is about 463.0591334611.

The spelling of 99290881 in words is "ninety-nine million, two hundred ninety thousand, eight hundred eighty-one".