645859579 has 2 divisors, whose sum is σ = 645859580. Its totient is φ = 645859578.

The previous prime is 645859547. The next prime is 645859583. The reversal of 645859579 is 975958546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645859579 - 2⁵ = 645859547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (645859519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322929789 + 322929790.

It is an arithmetic number, because the mean of its divisors is an integer number (322929790).

Almost surely, 2^645859579 is an apocalyptic number.

645859579 is a deficient number, since it is larger than the sum of its proper divisors (1).

645859579 is an equidigital number, since it uses as much as digits as its factorization.

645859579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608000, while the sum is 58.

The square root of 645859579 is about 25413.7675089704. The cubic root of 645859579 is about 864.3959068600.

The spelling of 645859579 in words is "six hundred forty-five million, eight hundred fifty-nine thousand, five hundred seventy-nine".