3121496647 has 2 divisors, whose sum is σ = 3121496648. Its totient is φ = 3121496646.

The previous prime is 3121496641. The next prime is 3121496659. The reversal of 3121496647 is 7466941213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121496647 - 2²³ = 3113108039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121496641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560748323 + 1560748324.

It is an arithmetic number, because the mean of its divisors is an integer number (1560748324).

Almost surely, 2^3121496647 is an apocalyptic number.

3121496647 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121496647 is an equidigital number, since it uses as much as digits as its factorization.

3121496647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 43.

The square root of 3121496647 is about 55870.3557085508. The cubic root of 3121496647 is about 1461.4623252802.

The spelling of 3121496647 in words is "three billion, one hundred twenty-one million, four hundred ninety-six thousand, six hundred forty-seven".