1749116861 has 2 divisors, whose sum is σ = 1749116862. Its totient is φ = 1749116860.

The previous prime is 1749116827. The next prime is 1749116899. The reversal of 1749116861 is 1686119471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1691265625 + 57851236 = 41125^2 + 7606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1749116861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1749116561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 874558430 + 874558431.

It is an arithmetic number, because the mean of its divisors is an integer number (874558431).

Almost surely, 2^1749116861 is an apocalyptic number.

It is an amenable number.

1749116861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1749116861 is an equidigital number, since it uses as much as digits as its factorization.

1749116861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 1749116861 is about 41822.4444646651. Note that the first 4 decimals coincide. The cubic root of 1749116861 is about 1204.8683845850.

The spelling of 1749116861 in words is "one billion, seven hundred forty-nine million, one hundred sixteen thousand, eight hundred sixty-one".