4727643257 has 4 divisors (see below), whose sum is σ = 4747260276. Its totient is φ = 4708026240.

The previous prime is 4727643227. The next prime is 4727643287. The reversal of 4727643257 is 7523467274.

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 (4727643227) and next prime (4727643287).

It can be written as a sum of positive squares in 2 ways, for example, as 2413167376 + 2314475881 = 49124^2 + 48109^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4727643257 is a prime.

It is a super-2 number, since 2×4727643257² = 44701221530915136098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4727643227) 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, 9808148 + ... + 9808629.

It is an arithmetic number, because the mean of its divisors is an integer number (1186815069).

Almost surely, 2^4727643257 is an apocalyptic number.

It is an amenable number.

4727643257 is a deficient number, since it is larger than the sum of its proper divisors (19617019).

4727643257 is a wasteful number, since it uses less digits than its factorization.

4727643257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19617018.

The product of its digits is 1975680, while the sum is 47.

The square root of 4727643257 is about 68757.8596016485. The cubic root of 4727643257 is about 1678.3462629793.

The spelling of 4727643257 in words is "four billion, seven hundred twenty-seven million, six hundred forty-three thousand, two hundred fifty-seven".