675021553 has 4 divisors (see below), whose sum is σ = 678519268. Its totient is φ = 671523840.

The previous prime is 675021517. The next prime is 675021563. The reversal of 675021553 is 355120576.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 387617344 + 287404209 = 19688^2 + 16953^2 .

It is a cyclic number.

It is not a de Polignac number, because 675021553 - 2⁹ = 675021041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675021563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748568 + ... + 1748953.

It is an arithmetic number, because the mean of its divisors is an integer number (169629817).

Almost surely, 2^675021553 is an apocalyptic number.

It is an amenable number.

675021553 is a deficient number, since it is larger than the sum of its proper divisors (3497715).

675021553 is a wasteful number, since it uses less digits than its factorization.

675021553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497714.

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 675021553 is about 25981.1768979005. The cubic root of 675021553 is about 877.2146578614.

The spelling of 675021553 in words is "six hundred seventy-five million, twenty-one thousand, five hundred fifty-three".