3121344287 has 2 divisors, whose sum is σ = 3121344288. Its totient is φ = 3121344286.

The previous prime is 3121344277. The next prime is 3121344341. The reversal of 3121344287 is 7824431213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121344287 - 2⁶ = 3121344223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121344257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560672143 + 1560672144.

It is an arithmetic number, because the mean of its divisors is an integer number (1560672144).

Almost surely, 2^3121344287 is an apocalyptic number.

3121344287 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121344287 is an equidigital number, since it uses as much as digits as its factorization.

3121344287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 3121344287 is about 55868.9921781304. The cubic root of 3121344287 is about 1461.4385469405.

The spelling of 3121344287 in words is "three billion, one hundred twenty-one million, three hundred forty-four thousand, two hundred eighty-seven".