1469849981 has 2 divisors, whose sum is σ = 1469849982. Its totient is φ = 1469849980.

The previous prime is 1469849957. The next prime is 1469849987. The reversal of 1469849981 is 1899489641.

1469849981 = 27109² + 27110².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 734952100 + 734897881 = 27110^2 + 27109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1469849981 - 2⁶ = 1469849917 is a prime.

It is a super-2 number, since 2×1469849981² = 4320917933291400722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1469849981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1469849987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 734924990 + 734924991.

It is an arithmetic number, because the mean of its divisors is an integer number (734924991).

Almost surely, 2^1469849981 is an apocalyptic number.

1469849981 is the 27110-th centered square number.

It is an amenable number.

1469849981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1469849981 is an equidigital number, since it uses as much as digits as its factorization.

1469849981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 59.

The square root of 1469849981 is about 38338.6225756743. The cubic root of 1469849981 is about 1136.9926843897.

The spelling of 1469849981 in words is "one billion, four hundred sixty-nine million, eight hundred forty-nine thousand, nine hundred eighty-one".