645077 has 2 divisors, whose sum is σ = 645078. Its totient is φ = 645076.

The previous prime is 645067. The next prime is 645083. The reversal of 645077 is 770546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630436 + 14641 = 794^2 + 121^2 .

It is a cyclic number.

It is not a de Polignac number, because 645077 - 2⁶ = 645013 is a prime.

It is a super-2 number, since 2×645077² = 832248671858, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 645077.

It is not a weakly prime, because it can be changed into another prime (645037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322538 + 322539.

It is an arithmetic number, because the mean of its divisors is an integer number (322539).

2⁶⁴⁵⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

645077 is a deficient number, since it is larger than the sum of its proper divisors (1).

645077 is an equidigital number, since it uses as much as digits as its factorization.

645077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 645077 is about 803.1668568859. The cubic root of 645077 is about 86.4046640286.

The spelling of 645077 in words is "six hundred forty-five thousand, seventy-seven".