3103691861 has 4 divisors (see below), whose sum is σ = 3104826924. Its totient is φ = 3102556800.

The previous prime is 3103691837. The next prime is 3103691863. The reversal of 3103691861 is 1681963013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2358947761 + 744744100 = 48569^2 + 27290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3103691861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3103691863) 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, 563420 + ... + 568901.

It is an arithmetic number, because the mean of its divisors is an integer number (776206731).

Almost surely, 2^3103691861 is an apocalyptic number.

It is an amenable number.

3103691861 is a deficient number, since it is larger than the sum of its proper divisors (1135063).

3103691861 is a wasteful number, since it uses less digits than its factorization.

3103691861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135062.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 3103691861 is about 55710.7876537390. The cubic root of 3103691861 is about 1458.6783343223.

The spelling of 3103691861 in words is "three billion, one hundred three million, six hundred ninety-one thousand, eight hundred sixty-one".