545620657 has 2 divisors, whose sum is σ = 545620658. Its totient is φ = 545620656.

The previous prime is 545620643. The next prime is 545620727. The reversal of 545620657 is 756026545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 347486881 + 198133776 = 18641^2 + 14076^2 .

It is a cyclic number.

It is not a de Polignac number, because 545620657 - 2¹⁹ = 545096369 is a prime.

It is a super-2 number, since 2×545620657² = 595403802690223298, which contains 22 as substring.

It is equal to p_28627573 and since 545620657 and 28627573 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (545620157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272810328 + 272810329.

It is an arithmetic number, because the mean of its divisors is an integer number (272810329).

Almost surely, 2^545620657 is an apocalyptic number.

It is an amenable number.

545620657 is a deficient number, since it is larger than the sum of its proper divisors (1).

545620657 is an equidigital number, since it uses as much as digits as its factorization.

545620657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 545620657 is about 23358.5242898604. The cubic root of 545620657 is about 817.1408739100.

The spelling of 545620657 in words is "five hundred forty-five million, six hundred twenty thousand, six hundred fifty-seven".