63857849 has 4 divisors (see below), whose sum is σ = 69663120. Its totient is φ = 58052580.

The previous prime is 63857839. The next prime is 63857863. The reversal of 63857849 is 94875836.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63857849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63857797 and 63857806.

It is not an unprimeable number, because it can be changed into a prime (63857809) 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, 2902619 + ... + 2902640.

It is an arithmetic number, because the mean of its divisors is an integer number (17415780).

Almost surely, 2^63857849 is an apocalyptic number.

It is an amenable number.

63857849 is a deficient number, since it is larger than the sum of its proper divisors (5805271).

63857849 is a wasteful number, since it uses less digits than its factorization.

63857849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805270.

The product of its digits is 1451520, while the sum is 50.

The square root of 63857849 is about 7991.1106236868. The cubic root of 63857849 is about 399.7036325534.

The spelling of 63857849 in words is "sixty-three million, eight hundred fifty-seven thousand, eight hundred forty-nine".