545515393 has 2 divisors, whose sum is σ = 545515394. Its totient is φ = 545515392.

The previous prime is 545515367. The next prime is 545515409. The reversal of 545515393 is 393515545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 527942529 + 17572864 = 22977^2 + 4192^2 .

It is a cyclic number.

It is not a de Polignac number, because 545515393 - 2²¹ = 543418241 is a prime.

It is not a weakly prime, because it can be changed into another prime (545515343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272757696 + 272757697.

It is an arithmetic number, because the mean of its divisors is an integer number (272757697).

Almost surely, 2^545515393 is an apocalyptic number.

It is an amenable number.

545515393 is a deficient number, since it is larger than the sum of its proper divisors (1).

545515393 is an equidigital number, since it uses as much as digits as its factorization.

545515393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 202500, while the sum is 40.

The square root of 545515393 is about 23356.2709566403. The cubic root of 545515393 is about 817.0883214953.

The spelling of 545515393 in words is "five hundred forty-five million, five hundred fifteen thousand, three hundred ninety-three".