5390243257 has 8 divisors (see below), whose sum is σ = 6216795200. Its totient is φ = 4577820624.

The previous prime is 5390243239. The next prime is 5390243267. The reversal of 5390243257 is 7523420935.

5390243257 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5390243257 - 2⁷ = 5390243129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5390243267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3531507 + ... + 3533032.

It is an arithmetic number, because the mean of its divisors is an integer number (777099400).

Almost surely, 2^5390243257 is an apocalyptic number.

It is an amenable number.

5390243257 is a deficient number, since it is larger than the sum of its proper divisors (826551943).

5390243257 is a wasteful number, since it uses less digits than its factorization.

5390243257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064655.

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 5390243257 is about 73418.2760421409. The cubic root of 5390243257 is about 1753.3533803756.

The spelling of 5390243257 in words is "five billion, three hundred ninety million, two hundred forty-three thousand, two hundred fifty-seven".