3857650243 has 4 divisors (see below), whose sum is σ = 3857901640. Its totient is φ = 3857398848.

The previous prime is 3857650207. The next prime is 3857650249. The reversal of 3857650243 is 3420567583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3420567583 = 53 ⋅64539011.

It is a cyclic number.

It is not a de Polignac number, because 3857650243 - 2²⁵ = 3824095811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3857650243.

It is not an unprimeable number, because it can be changed into a prime (3857650249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101073 + ... + 133906.

It is an arithmetic number, because the mean of its divisors is an integer number (964475410).

Almost surely, 2^3857650243 is an apocalyptic number.

3857650243 is a deficient number, since it is larger than the sum of its proper divisors (251397).

3857650243 is a wasteful number, since it uses less digits than its factorization.

3857650243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251396.

The product of its (nonzero) digits is 604800, while the sum is 43.

The square root of 3857650243 is about 62109.9850507147. The cubic root of 3857650243 is about 1568.3426386337.

The spelling of 3857650243 in words is "three billion, eight hundred fifty-seven million, six hundred fifty thousand, two hundred forty-three".