1047901681 has 4 divisors (see below), whose sum is σ = 1054576372. Its totient is φ = 1041226992.

The previous prime is 1047901667. The next prime is 1047901721. The reversal of 1047901681 is 1861097401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1861097401 = 3137 ⋅593273.

It can be written as a sum of positive squares in 2 ways, for example, as 501043456 + 546858225 = 22384^2 + 23385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1047901681 - 2⁷ = 1047901553 is a prime.

It is a super-2 number, since 2×1047901681² = 2196195866085251522, which contains 22 as substring.

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 1047901681.

It is not an unprimeable number, because it can be changed into a prime (1047901651) 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, 3337110 + ... + 3337423.

It is an arithmetic number, because the mean of its divisors is an integer number (263644093).

Almost surely, 2^1047901681 is an apocalyptic number.

It is an amenable number.

1047901681 is a deficient number, since it is larger than the sum of its proper divisors (6674691).

1047901681 is an equidigital number, since it uses as much as digits as its factorization.

1047901681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674690.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 1047901681 is about 32371.3095348335. The cubic root of 1047901681 is about 1015.7188501342.

The spelling of 1047901681 in words is "one billion, forty-seven million, nine hundred one thousand, six hundred eighty-one".