30772013 has 2 divisors, whose sum is σ = 30772014. Its totient is φ = 30772012.

The previous prime is 30772009. The next prime is 30772033. The reversal of 30772013 is 31027703.

30772013 = 3922² + 3923².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15389929 + 15382084 = 3923^2 + 3922^2 .

It is a cyclic number.

It is not a de Polignac number, because 30772013 - 2² = 30772009 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30772013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30772033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15386006 + 15386007.

It is an arithmetic number, because the mean of its divisors is an integer number (15386007).

Almost surely, 2^30772013 is an apocalyptic number.

30772013 is the 3923-rd centered square number.

It is an amenable number.

30772013 is a deficient number, since it is larger than the sum of its proper divisors (1).

30772013 is an equidigital number, since it uses as much as digits as its factorization.

30772013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 30772013 is about 5547.2527434758. The cubic root of 30772013 is about 313.3660685833.

Adding to 30772013 its reverse (31027703), we get a palindrome (61799716).

The spelling of 30772013 in words is "thirty million, seven hundred seventy-two thousand, thirteen".