545670257 has 4 divisors (see below), whose sum is σ = 595276656. Its totient is φ = 496063860.

The previous prime is 545670217. The next prime is 545670259. The reversal of 545670257 is 752076545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 545670257 - 2¹⁴ = 545653873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545670259) 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, 24803183 + ... + 24803204.

It is an arithmetic number, because the mean of its divisors is an integer number (148819164).

Almost surely, 2^545670257 is an apocalyptic number.

It is an amenable number.

545670257 is a deficient number, since it is larger than the sum of its proper divisors (49606399).

545670257 is a wasteful number, since it uses less digits than its factorization.

545670257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49606398.

The product of its (nonzero) digits is 294000, while the sum is 41.

The square root of 545670257 is about 23359.5859766392. The cubic root of 545670257 is about 817.1656340669.

The spelling of 545670257 in words is "five hundred forty-five million, six hundred seventy thousand, two hundred fifty-seven".