30639361 has 2 divisors, whose sum is σ = 30639362. Its totient is φ = 30639360.

The previous prime is 30639331. The next prime is 30639373. The reversal of 30639361 is 16393603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30636225 + 3136 = 5535^2 + 56^2 .

It is a cyclic number.

It is not a de Polignac number, because 30639361 - 2⁷ = 30639233 is a prime.

It is not a weakly prime, because it can be changed into another prime (30639331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15319680 + 15319681.

It is an arithmetic number, because the mean of its divisors is an integer number (15319681).

Almost surely, 2^30639361 is an apocalyptic number.

It is an amenable number.

30639361 is a deficient number, since it is larger than the sum of its proper divisors (1).

30639361 is an equidigital number, since it uses as much as digits as its factorization.

30639361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 30639361 is about 5535.2832809171. The cubic root of 30639361 is about 312.9151338270.

The spelling of 30639361 in words is "thirty million, six hundred thirty-nine thousand, three hundred sixty-one".