3509627981 has 2 divisors, whose sum is σ = 3509627982. Its totient is φ = 3509627980.

The previous prime is 3509627963. The next prime is 3509627999. The reversal of 3509627981 is 1897269053.

3509627981 = 41890² + 41891².

It is a balanced prime because it is at equal distance from previous prime (3509627963) and next prime (3509627999).

It can be written as a sum of positive squares in only one way, i.e., 1754855881 + 1754772100 = 41891^2 + 41890^2 .

It is a cyclic number.

It is not a de Polignac number, because 3509627981 - 2²⁶ = 3442519117 is a prime.

It is a super-2 number, since 2×3509627981² = 24634977130036272722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3509627911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1754813990 + 1754813991.

It is an arithmetic number, because the mean of its divisors is an integer number (1754813991).

Almost surely, 2^3509627981 is an apocalyptic number.

3509627981 is the 41891-st centered square number.

It is an amenable number.

3509627981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3509627981 is an equidigital number, since it uses as much as digits as its factorization.

3509627981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 3509627981 is about 59242.1132388101. The cubic root of 3509627981 is about 1519.6854123022.

The spelling of 3509627981 in words is "three billion, five hundred nine million, six hundred twenty-seven thousand, nine hundred eighty-one".