591396397 has 2 divisors, whose sum is σ = 591396398. Its totient is φ = 591396396.

The previous prime is 591396389. The next prime is 591396431. The reversal of 591396397 is 793693195.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 448211241 + 143185156 = 21171^2 + 11966^2 .

It is a cyclic number.

It is not a de Polignac number, because 591396397 - 2³ = 591396389 is a prime.

It is a super-4 number, since 4×591396397⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (591396307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 295698198 + 295698199.

It is an arithmetic number, because the mean of its divisors is an integer number (295698199).

Almost surely, 2^591396397 is an apocalyptic number.

It is an amenable number.

591396397 is a deficient number, since it is larger than the sum of its proper divisors (1).

591396397 is an equidigital number, since it uses as much as digits as its factorization.

591396397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377810, while the sum is 52.

The square root of 591396397 is about 24318.6429925685. The cubic root of 591396397 is about 839.3818188887.

It can be divided in two parts, 59139 and 6397, that added together give a 16-th power (65536 = 2¹⁶).

The spelling of 591396397 in words is "five hundred ninety-one million, three hundred ninety-six thousand, three hundred ninety-seven".