99349981 has 4 divisors (see below), whose sum is σ = 99650464. Its totient is φ = 99049500.

The previous prime is 99349973. The next prime is 99350021. The reversal of 99349981 is 18994399.

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 a cyclic number.

It is not a de Polignac number, because 99349981 - 2³ = 99349973 is a prime.

It is a super-2 number, since 2×99349981² = 19740837449400722, 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 (99340981) 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, 149745 + ... + 150406.

It is an arithmetic number, because the mean of its divisors is an integer number (24912616).

Almost surely, 2^99349981 is an apocalyptic number.

It is an amenable number.

99349981 is a deficient number, since it is larger than the sum of its proper divisors (300483).

99349981 is a wasteful number, since it uses less digits than its factorization.

99349981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300482.

The product of its digits is 629856, while the sum is 52.

The square root of 99349981 is about 9967.4460620562. The cubic root of 99349981 is about 463.1509893850.

The spelling of 99349981 in words is "ninety-nine million, three hundred forty-nine thousand, nine hundred eighty-one".