675990257 has 4 divisors (see below), whose sum is σ = 676380276. Its totient is φ = 675600240.

The previous prime is 675990253. The next prime is 675990277. The reversal of 675990257 is 752099576.

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 94167616 + 581822641 = 9704^2 + 24121^2 .

It is a cyclic number.

It is not a de Polignac number, because 675990257 - 2² = 675990253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675990253) 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, 192398 + ... + 195879.

It is an arithmetic number, because the mean of its divisors is an integer number (169095069).

Almost surely, 2^675990257 is an apocalyptic number.

It is an amenable number.

675990257 is a deficient number, since it is larger than the sum of its proper divisors (390019).

675990257 is a wasteful number, since it uses less digits than its factorization.

675990257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390018.

The product of its (nonzero) digits is 1190700, while the sum is 50.

The square root of 675990257 is about 25999.8126339403. The cubic root of 675990257 is about 877.6340791271.

The spelling of 675990257 in words is "six hundred seventy-five million, nine hundred ninety thousand, two hundred fifty-seven".