3640623347 has 4 divisors (see below), whose sum is σ = 3641348040. Its totient is φ = 3639898656.

The previous prime is 3640623317. The next prime is 3640623377. The reversal of 3640623347 is 7433260463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7433260463 = 4093 ⋅1816091.

It is an interprime number because it is at equal distance from previous prime (3640623317) and next prime (3640623377).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3640623347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3640623347.

It is not an unprimeable number, because it can be changed into a prime (3640623317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354758 + ... + 364875.

It is an arithmetic number, because the mean of its divisors is an integer number (910337010).

Almost surely, 2^3640623347 is an apocalyptic number.

3640623347 is a deficient number, since it is larger than the sum of its proper divisors (724693).

3640623347 is an equidigital number, since it uses as much as digits as its factorization.

3640623347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724692.

The product of its (nonzero) digits is 217728, while the sum is 38.

The square root of 3640623347 is about 60337.5782328061. The cubic root of 3640623347 is about 1538.3621405884.

The spelling of 3640623347 in words is "three billion, six hundred forty million, six hundred twenty-three thousand, three hundred forty-seven".