3128693 has 2 divisors, whose sum is σ = 3128694. Its totient is φ = 3128692.

The previous prime is 3128689. The next prime is 3128701. The reversal of 3128693 is 3968213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2900209 + 228484 = 1703^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128693 - 2² = 3128689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3128623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564346 + 1564347.

It is an arithmetic number, because the mean of its divisors is an integer number (1564347).

Almost surely, 2^3128693 is an apocalyptic number.

It is an amenable number.

3128693 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128693 is an equidigital number, since it uses as much as digits as its factorization.

3128693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 3128693 is about 1768.8111826874. The cubic root of 3128693 is about 146.2584556925.

The spelling of 3128693 in words is "three million, one hundred twenty-eight thousand, six hundred ninety-three".