30999406 has 4 divisors (see below), whose sum is σ = 46499112. Its totient is φ = 15499702.

The previous prime is 30999391. The next prime is 30999413. The reversal of 30999406 is 60499903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60499903 = 193 ⋅313471.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7749850 + ... + 7749853.

It is an arithmetic number, because the mean of its divisors is an integer number (11624778).

Almost surely, 2^30999406 is an apocalyptic number.

30999406 is a deficient number, since it is larger than the sum of its proper divisors (15499706).

30999406 is a wasteful number, since it uses less digits than its factorization.

30999406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15499705.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 30999406 is about 5567.7110197998. The cubic root of 30999406 is about 314.1360587961.

The spelling of 30999406 in words is "thirty million, nine hundred ninety-nine thousand, four hundred six".