30739861 has 2 divisors, whose sum is σ = 30739862. Its totient is φ = 30739860.

The previous prime is 30739847. The next prime is 30739871. The reversal of 30739861 is 16893703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25310961 + 5428900 = 5031^2 + 2330^2 .

It is a cyclic number.

It is not a de Polignac number, because 30739861 - 2¹³ = 30731669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30739861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30739811) 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 as a sum of consecutive naturals, namely, 15369930 + 15369931.

It is an arithmetic number, because the mean of its divisors is an integer number (15369931).

Almost surely, 2^30739861 is an apocalyptic number.

It is an amenable number.

30739861 is a deficient number, since it is larger than the sum of its proper divisors (1).

30739861 is an equidigital number, since it uses as much as digits as its factorization.

30739861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 30739861 is about 5544.3539749911. The cubic root of 30739861 is about 313.2568908386.

The spelling of 30739861 in words is "thirty million, seven hundred thirty-nine thousand, eight hundred sixty-one".