1047438851 has 4 divisors (see below), whose sum is σ = 1069724832. Its totient is φ = 1025152872.

The previous prime is 1047438839. The next prime is 1047438853. The reversal of 1047438851 is 1588347401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1588347401 = 15053 ⋅105517.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1047438851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1047438799 and 1047438808.

It is not an unprimeable number, because it can be changed into a prime (1047438853) 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, 11142920 + ... + 11143013.

It is an arithmetic number, because the mean of its divisors is an integer number (267431208).

Almost surely, 2^1047438851 is an apocalyptic number.

1047438851 is a deficient number, since it is larger than the sum of its proper divisors (22285981).

1047438851 is an equidigital number, since it uses as much as digits as its factorization.

1047438851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22285980.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 1047438851 is about 32364.1599767397. The cubic root of 1047438851 is about 1015.5692895434.

The spelling of 1047438851 in words is "one billion, forty-seven million, four hundred thirty-eight thousand, eight hundred fifty-one".