675400393 has 4 divisors (see below), whose sum is σ = 676215940. Its totient is φ = 674584848.

The previous prime is 675400381. The next prime is 675400403. The reversal of 675400393 is 393004576.

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 565821369 + 109579024 = 23787^2 + 10468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-675400393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675400303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406530 + ... + 408187.

It is an arithmetic number, because the mean of its divisors is an integer number (169053985).

Almost surely, 2^675400393 is an apocalyptic number.

It is an amenable number.

675400393 is a deficient number, since it is larger than the sum of its proper divisors (815547).

675400393 is an equidigital number, since it uses as much as digits as its factorization.

675400393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815546.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 675400393 is about 25988.4665380626. The cubic root of 675400393 is about 877.3787325487.

The spelling of 675400393 in words is "six hundred seventy-five million, four hundred thousand, three hundred ninety-three".