645096079 has 2 divisors, whose sum is σ = 645096080. Its totient is φ = 645096078.

The previous prime is 645096077. The next prime is 645096083. The reversal of 645096079 is 970690546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645096079 - 2¹ = 645096077 is a prime.

It is a super-2 number, since 2×645096079² = 832297902282348482, which contains 22 as substring.

Together with 645096077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645096077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322548039 + 322548040.

It is an arithmetic number, because the mean of its divisors is an integer number (322548040).

Almost surely, 2^645096079 is an apocalyptic number.

645096079 is a deficient number, since it is larger than the sum of its proper divisors (1).

645096079 is an equidigital number, since it uses as much as digits as its factorization.

645096079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 645096079 is about 25398.7416814298. The cubic root of 645096079 is about 864.0551586406.

The spelling of 645096079 in words is "six hundred forty-five million, ninety-six thousand, seventy-nine".