641365207 has 4 divisors (see below), whose sum is σ = 732988816. Its totient is φ = 549741600.

The previous prime is 641365187. The next prime is 641365237. The reversal of 641365207 is 702563146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702563146 = 2 ⋅351281573.

It is a cyclic number.

It is not a de Polignac number, because 641365207 - 2²³ = 632976599 is a prime.

It is a super-2 number, since 2×641365207² = 822698657500305698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641365237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45811794 + ... + 45811807.

It is an arithmetic number, because the mean of its divisors is an integer number (183247204).

Almost surely, 2^641365207 is an apocalyptic number.

641365207 is a deficient number, since it is larger than the sum of its proper divisors (91623609).

641365207 is an equidigital number, since it uses as much as digits as its factorization.

641365207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91623608.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 641365207 is about 25325.1891799449. The cubic root of 641365207 is about 862.3862011030.

The spelling of 641365207 in words is "six hundred forty-one million, three hundred sixty-five thousand, two hundred seven".