30520493 has 2 divisors, whose sum is σ = 30520494. Its totient is φ = 30520492.

The previous prime is 30520489. The next prime is 30520537. The reversal of 30520493 is 39402503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18003049 + 12517444 = 4243^2 + 3538^2 .

It is a cyclic number.

It is not a de Polignac number, because 30520493 - 2² = 30520489 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30520393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15260246 + 15260247.

It is an arithmetic number, because the mean of its divisors is an integer number (15260247).

Almost surely, 2^30520493 is an apocalyptic number.

It is an amenable number.

30520493 is a deficient number, since it is larger than the sum of its proper divisors (1).

30520493 is an equidigital number, since it uses as much as digits as its factorization.

30520493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 30520493 is about 5524.5355460889. The cubic root of 30520493 is about 312.5099491232.

Adding to 30520493 its reverse (39402503), we get a palindrome (69922996).

It can be divided in two parts, 30520 and 493, that added together give a palindrome (31013).

The spelling of 30520493 in words is "thirty million, five hundred twenty thousand, four hundred ninety-three".