1868786147 has 4 divisors (see below), whose sum is σ = 1871275296. Its totient is φ = 1866297000.

The previous prime is 1868786131. The next prime is 1868786207. The reversal of 1868786147 is 7416878681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7416878681 = 31 ⋅239254151.

It is a cyclic number.

It is not a de Polignac number, because 1868786147 - 2⁴ = 1868786131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1868786092 and 1868786101.

It is not an unprimeable number, because it can be changed into a prime (1868786747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243448 + ... + 1244949.

It is an arithmetic number, because the mean of its divisors is an integer number (467818824).

Almost surely, 2^1868786147 is an apocalyptic number.

1868786147 is a deficient number, since it is larger than the sum of its proper divisors (2489149).

1868786147 is an equidigital number, since it uses as much as digits as its factorization.

1868786147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489148.

The product of its digits is 3612672, while the sum is 56.

The square root of 1868786147 is about 43229.4592494516. The cubic root of 1868786147 is about 1231.7423358784.

The spelling of 1868786147 in words is "one billion, eight hundred sixty-eight million, seven hundred eighty-six thousand, one hundred forty-seven".