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30520493 is a prime number
BaseRepresentation
bin111010001101…
…1010010101101
32010102121020122
41310123102231
530303123433
63010054325
7520264013
oct164332255
963377218
1030520493
1116256553
12a27a3a5
136427b83
1440a68b3
152a2d198
hex1d1b4ad

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, 230520493 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".