30754981 has 2 divisors, whose sum is σ = 30754982. Its totient is φ = 30754980.

The previous prime is 30754931. The next prime is 30754991. The reversal of 30754981 is 18945703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21808900 + 8946081 = 4670^2 + 2991^2 .

It is a cyclic number.

It is not a de Polignac number, because 30754981 - 2¹⁷ = 30623909 is a prime.

It is a super-2 number, since 2×30754981² = 1891737712620722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30754981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30754931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15377490 + 15377491.

It is an arithmetic number, because the mean of its divisors is an integer number (15377491).

Almost surely, 2^30754981 is an apocalyptic number.

It is an amenable number.

30754981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30754981 is an equidigital number, since it uses as much as digits as its factorization.

30754981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 30754981 is about 5545.7173566636. The cubic root of 30754981 is about 313.3082429233.

The spelling of 30754981 in words is "thirty million, seven hundred fifty-four thousand, nine hundred eighty-one".