1099665461 has 2 divisors, whose sum is σ = 1099665462. Its totient is φ = 1099665460.

The previous prime is 1099665409. The next prime is 1099665499. The reversal of 1099665461 is 1645669901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 703257361 + 396408100 = 26519^2 + 19910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099665461 is a prime.

It is a super-2 number, since 2×1099665461² = 2418528252232685042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099665401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549832730 + 549832731.

It is an arithmetic number, because the mean of its divisors is an integer number (549832731).

Almost surely, 2^1099665461 is an apocalyptic number.

It is an amenable number.

1099665461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099665461 is an equidigital number, since it uses as much as digits as its factorization.

1099665461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 1099665461 is about 33161.2041548554. The cubic root of 1099665461 is about 1032.1754569799.

The spelling of 1099665461 in words is "one billion, ninety-nine million, six hundred sixty-five thousand, four hundred sixty-one".