30059981 has 6 divisors (see below), whose sum is σ = 34967790. Its totient is φ = 25765656.

The previous prime is 30059963. The next prime is 30059983. The reversal of 30059981 is 18995003.

It can be written as a sum of positive squares in only one way, i.e., 20702500 + 9357481 = 4550^2 + 3059^2 .

It is not a de Polignac number, because 30059981 - 2⁶ = 30059917 is a prime.

It is a super-2 number, since 2×30059981² = 1807204915440722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30059983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 306686 + ... + 306783.

It is an arithmetic number, because the mean of its divisors is an integer number (5827965).

Almost surely, 2^30059981 is an apocalyptic number.

It is an amenable number.

30059981 is a deficient number, since it is larger than the sum of its proper divisors (4907809).

30059981 is an equidigital number, since it uses as much as digits as its factorization.

30059981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613483 (or 613476 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 30059981 is about 5482.6983320259. The cubic root of 30059981 is about 310.9301959733.

The spelling of 30059981 in words is "thirty million, fifty-nine thousand, nine hundred eighty-one".