1486721881 has 2 divisors, whose sum is σ = 1486721882. Its totient is φ = 1486721880.

The previous prime is 1486721867. The next prime is 1486721891. The reversal of 1486721881 is 1881276841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1227801600 + 258920281 = 35040^2 + 16091^2 .

It is a cyclic number.

It is not a de Polignac number, because 1486721881 - 2¹¹ = 1486719833 is a prime.

It is a super-2 number, since 2×1486721881² = 4420683902888356322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1486721891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743360940 + 743360941.

It is an arithmetic number, because the mean of its divisors is an integer number (743360941).

Almost surely, 2^1486721881 is an apocalyptic number.

It is an amenable number.

1486721881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1486721881 is an equidigital number, since it uses as much as digits as its factorization.

1486721881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 46.

The square root of 1486721881 is about 38558.0326391272. The cubic root of 1486721881 is about 1141.3265262614.

The spelling of 1486721881 in words is "one billion, four hundred eighty-six million, seven hundred twenty-one thousand, eight hundred eighty-one".