3640893947 has 2 divisors, whose sum is σ = 3640893948. Its totient is φ = 3640893946.

The previous prime is 3640893911. The next prime is 3640893959. The reversal of 3640893947 is 7493980463.

It is a strong prime.

It is an emirp because it is prime and its reverse (7493980463) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3640893947 - 2²⁸ = 3372458491 is a prime.

It is a super-2 number, since 2×3640893947² = 26512217466602477618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3640893547) 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 as a sum of consecutive naturals, namely, 1820446973 + 1820446974.

It is an arithmetic number, because the mean of its divisors is an integer number (1820446974).

Almost surely, 2^3640893947 is an apocalyptic number.

3640893947 is a deficient number, since it is larger than the sum of its proper divisors (1).

3640893947 is an equidigital number, since it uses as much as digits as its factorization.

3640893947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The square root of 3640893947 is about 60339.8205748078. The cubic root of 3640893947 is about 1538.4002540690.

The spelling of 3640893947 in words is "three billion, six hundred forty million, eight hundred ninety-three thousand, nine hundred forty-seven".