383648645 has 4 divisors (see below), whose sum is σ = 460378380. Its totient is φ = 306918912.

The previous prime is 383648593. The next prime is 383648687. The reversal of 383648645 is 546846383.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141752836 + 241895809 = 11906^2 + 15553^2 .

It is a cyclic number.

It is not a de Polignac number, because 383648645 - 2¹² = 383644549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 383648645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38364860 + ... + 38364869.

It is an arithmetic number, because the mean of its divisors is an integer number (115094595).

Almost surely, 2^383648645 is an apocalyptic number.

It is an amenable number.

383648645 is a deficient number, since it is larger than the sum of its proper divisors (76729735).

383648645 is an equidigital number, since it uses as much as digits as its factorization.

383648645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76729734.

The product of its digits is 1658880, while the sum is 47.

The square root of 383648645 is about 19586.9508857300. The cubic root of 383648645 is about 726.6264839277.

The spelling of 383648645 in words is "three hundred eighty-three million, six hundred forty-eight thousand, six hundred forty-five".