30998493 has 12 divisors (see below), whose sum is σ = 44824000. Its totient is φ = 20643336.

The previous prime is 30998491. The next prime is 30998507. The reversal of 30998493 is 39489903.

It is not a de Polignac number, because 30998493 - 2¹ = 30998491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30998491) 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 11 ways as a sum of consecutive naturals, for example, 14508 + ... + 16506.

Almost surely, 2^30998493 is an apocalyptic number.

It is an amenable number.

30998493 is a deficient number, since it is larger than the sum of its proper divisors (13825507).

30998493 is a wasteful number, since it uses less digits than its factorization.

30998493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3728 (or 3725 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 30998493 is about 5567.6290285902. The cubic root of 30998493 is about 314.1329747689.

The spelling of 30998493 in words is "thirty million, nine hundred ninety-eight thousand, four hundred ninety-three".