30752681 has 2 divisors, whose sum is σ = 30752682. Its totient is φ = 30752680.

The previous prime is 30752671. The next prime is 30752693. The reversal of 30752681 is 18625703.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30250000 + 502681 = 5500^2 + 709^2 .

It is an emirp because it is prime and its reverse (18625703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30752681 - 2¹⁴ = 30736297 is a prime.

It is a super-2 number, since 2×30752681² = 1891454777375522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_1901669 and since 30752681 and 1901669 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (30752641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15376340 + 15376341.

It is an arithmetic number, because the mean of its divisors is an integer number (15376341).

Almost surely, 2^30752681 is an apocalyptic number.

It is an amenable number.

30752681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30752681 is an equidigital number, since it uses as much as digits as its factorization.

30752681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 30752681 is about 5545.5099855649. The cubic root of 30752681 is about 313.3004325145.

The spelling of 30752681 in words is "thirty million, seven hundred fifty-two thousand, six hundred eighty-one".