63740857 has 4 divisors (see below), whose sum is σ = 63921780. Its totient is φ = 63559936.

The previous prime is 63740849. The next prime is 63740861. The reversal of 63740857 is 75804736.

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 38700841 + 25040016 = 6221^2 + 5004^2 .

It is a cyclic number.

It is not a de Polignac number, because 63740857 - 2³ = 63740849 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63740657) 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, 89932 + ... + 90637.

It is an arithmetic number, because the mean of its divisors is an integer number (15980445).

Almost surely, 2^63740857 is an apocalyptic number.

It is an amenable number.

63740857 is a deficient number, since it is larger than the sum of its proper divisors (180923).

63740857 is a wasteful number, since it uses less digits than its factorization.

63740857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180922.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 63740857 is about 7983.7871339359. The cubic root of 63740857 is about 399.4593884270.

The spelling of 63740857 in words is "sixty-three million, seven hundred forty thousand, eight hundred fifty-seven".