30712661 has 12 divisors (see below), whose sum is σ = 36881280. Its totient is φ = 25474680.

The previous prime is 30712657. The next prime is 30712673. The reversal of 30712661 is 16621703.

It is not a de Polignac number, because 30712661 - 2² = 30712657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30712661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30712601) 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 11 ways as a sum of consecutive naturals, for example, 8591 + ... + 11628.

It is an arithmetic number, because the mean of its divisors is an integer number (3073440).

Almost surely, 2^30712661 is an apocalyptic number.

30712661 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30712661 is a deficient number, since it is larger than the sum of its proper divisors (6168619).

30712661 is a wasteful number, since it uses less digits than its factorization.

30712661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20264 (or 20257 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 30712661 is about 5541.9004862953. The cubic root of 30712661 is about 313.1644690176.

The spelling of 30712661 in words is "thirty million, seven hundred twelve thousand, six hundred sixty-one".