30618061 has 2 divisors, whose sum is σ = 30618062. Its totient is φ = 30618060.

The previous prime is 30618043. The next prime is 30618073. The reversal of 30618061 is 16081603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27102436 + 3515625 = 5206^2 + 1875^2 .

It is an emirp because it is prime and its reverse (16081603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30618061 - 2⁷ = 30617933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30618001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15309030 + 15309031.

It is an arithmetic number, because the mean of its divisors is an integer number (15309031).

Almost surely, 2^30618061 is an apocalyptic number.

It is an amenable number.

30618061 is a deficient number, since it is larger than the sum of its proper divisors (1).

30618061 is an equidigital number, since it uses as much as digits as its factorization.

30618061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 30618061 is about 5533.3589256436. The cubic root of 30618061 is about 312.8426057975.

Adding to 30618061 its reverse (16081603), we get a palindrome (46699664).

The spelling of 30618061 in words is "thirty million, six hundred eighteen thousand, sixty-one".