8390933645 has 4 divisors (see below), whose sum is σ = 10069120380. Its totient is φ = 6712746912.

The previous prime is 8390933633. The next prime is 8390933657. The reversal of 8390933645 is 5463390938.

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

It is an interprime number because it is at equal distance from previous prime (8390933633) and next prime (8390933657).

It can be written as a sum of positive squares in 2 ways, for example, as 1169503204 + 7221430441 = 34198^2 + 84979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8390933645 is a prime.

It is a super-3 number, since 3×8390933645³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8390933593 and 8390933602.

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, 839093360 + ... + 839093369.

It is an arithmetic number, because the mean of its divisors is an integer number (2517280095).

Almost surely, 2^8390933645 is an apocalyptic number.

It is an amenable number.

8390933645 is a deficient number, since it is larger than the sum of its proper divisors (1678186735).

8390933645 is a wasteful number, since it uses less digits than its factorization.

8390933645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678186734.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The square root of 8390933645 is about 91602.0395242377. The cubic root of 8390933645 is about 2032.0611003344.

The spelling of 8390933645 in words is "eight billion, three hundred ninety million, nine hundred thirty-three thousand, six hundred forty-five".