3121230397 has 2 divisors, whose sum is σ = 3121230398. Its totient is φ = 3121230396.

The previous prime is 3121230389. The next prime is 3121230407. The reversal of 3121230397 is 7930321213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1750083556 + 1371146841 = 41834^2 + 37029^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121230397 - 2³ = 3121230389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121230317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560615198 + 1560615199.

It is an arithmetic number, because the mean of its divisors is an integer number (1560615199).

Almost surely, 2^3121230397 is an apocalyptic number.

It is an amenable number.

3121230397 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121230397 is an equidigital number, since it uses as much as digits as its factorization.

3121230397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 3121230397 is about 55867.9729093512. The cubic root of 3121230397 is about 1461.4207719858.

The spelling of 3121230397 in words is "three billion, one hundred twenty-one million, two hundred thirty thousand, three hundred ninety-seven".