30496981 has 4 divisors (see below), whose sum is σ = 30564172. Its totient is φ = 30429792.

The previous prime is 30496927. The next prime is 30496987. The reversal of 30496981 is 18969403.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28793956 + 1703025 = 5366^2 + 1305^2 .

It is a cyclic number.

It is not a de Polignac number, because 30496981 - 2²¹ = 28399829 is a prime.

It is a super-2 number, since 2×30496981² = 1860131700228722, 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 (30496987) 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, 32910 + ... + 33823.

It is an arithmetic number, because the mean of its divisors is an integer number (7641043).

Almost surely, 2^30496981 is an apocalyptic number.

It is an amenable number.

30496981 is a deficient number, since it is larger than the sum of its proper divisors (67191).

30496981 is an equidigital number, since it uses as much as digits as its factorization.

30496981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67190.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 30496981 is about 5522.4071744123. The cubic root of 30496981 is about 312.4296793239.

The spelling of 30496981 in words is "thirty million, four hundred ninety-six thousand, nine hundred eighty-one".