30981099 has 8 divisors (see below), whose sum is σ = 42424720. Its totient is φ = 20095776.

The previous prime is 30981073. The next prime is 30981103. The reversal of 30981099 is 99018903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30981099 - 2⁸ = 30980843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30981029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139444 + ... + 139665.

It is an arithmetic number, because the mean of its divisors is an integer number (5303090).

Almost surely, 2^30981099 is an apocalyptic number.

30981099 is a deficient number, since it is larger than the sum of its proper divisors (11443621).

30981099 is a wasteful number, since it uses less digits than its factorization.

30981099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279149.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 30981099 is about 5566.0667441201. The cubic root of 30981099 is about 314.0742079198.

The spelling of 30981099 in words is "thirty million, nine hundred eighty-one thousand, ninety-nine".