616633397 has 2 divisors, whose sum is σ = 616633398. Its totient is φ = 616633396.

The previous prime is 616633343. The next prime is 616633411. The reversal of 616633397 is 793336616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579557476 + 37075921 = 24074^2 + 6089^2 .

It is a cyclic number.

It is not a de Polignac number, because 616633397 - 2¹² = 616629301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (616633327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308316698 + 308316699.

It is an arithmetic number, because the mean of its divisors is an integer number (308316699).

Almost surely, 2^616633397 is an apocalyptic number.

It is an amenable number.

616633397 is a deficient number, since it is larger than the sum of its proper divisors (1).

616633397 is an equidigital number, since it uses as much as digits as its factorization.

616633397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 44.

The square root of 616633397 is about 24832.1041597364. The cubic root of 616633397 is about 851.1557045174.

The spelling of 616633397 in words is "six hundred sixteen million, six hundred thirty-three thousand, three hundred ninety-seven".