1486441981 has 2 divisors, whose sum is σ = 1486441982. Its totient is φ = 1486441980.

The previous prime is 1486441963. The next prime is 1486441993. The reversal of 1486441981 is 1891446841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1439519481 + 46922500 = 37941^2 + 6850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1486441981 - 2¹⁵ = 1486409213 is a prime.

It is a super-2 number, since 2×1486441981² = 4419019525758408722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1486447981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743220990 + 743220991.

It is an arithmetic number, because the mean of its divisors is an integer number (743220991).

Almost surely, 2^1486441981 is an apocalyptic number.

It is an amenable number.

1486441981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1486441981 is an equidigital number, since it uses as much as digits as its factorization.

1486441981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 46.

The square root of 1486441981 is about 38554.4028743800. The cubic root of 1486441981 is about 1141.2548972300.

The spelling of 1486441981 in words is "one billion, four hundred eighty-six million, four hundred forty-one thousand, nine hundred eighty-one".