1681101709 has 4 divisors (see below), whose sum is σ = 1921259104. Its totient is φ = 1440944316.

The previous prime is 1681101707. The next prime is 1681101731. The reversal of 1681101709 is 9071011861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1681101709 - 2¹ = 1681101707 is a prime.

It is a super-2 number, since 2×1681101709² = 5652205912005441362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681101701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120078687 + ... + 120078700.

It is an arithmetic number, because the mean of its divisors is an integer number (480314776).

Almost surely, 2^1681101709 is an apocalyptic number.

It is an amenable number.

1681101709 is a deficient number, since it is larger than the sum of its proper divisors (240157395).

1681101709 is an equidigital number, since it uses as much as digits as its factorization.

1681101709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240157394.

The product of its (nonzero) digits is 3024, while the sum is 34.

The square root of 1681101709 is about 41001.2403348972. The cubic root of 1681101709 is about 1189.0441937820.

The spelling of 1681101709 in words is "one billion, six hundred eighty-one million, one hundred one thousand, seven hundred nine".