6355531397 has 2 divisors, whose sum is σ = 6355531398. Its totient is φ = 6355531396.

The previous prime is 6355531381. The next prime is 6355531409. The reversal of 6355531397 is 7931355536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3716243521 + 2639287876 = 60961^2 + 51374^2 .

It is a cyclic number.

It is not a de Polignac number, because 6355531397 - 2⁴ = 6355531381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6355531367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3177765698 + 3177765699.

It is an arithmetic number, because the mean of its divisors is an integer number (3177765699).

Almost surely, 2^6355531397 is an apocalyptic number.

It is an amenable number.

6355531397 is a deficient number, since it is larger than the sum of its proper divisors (1).

6355531397 is an equidigital number, since it uses as much as digits as its factorization.

6355531397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1275750, while the sum is 47.

The square root of 6355531397 is about 79721.5867692057. The cubic root of 6355531397 is about 1852.3254319025.

The spelling of 6355531397 in words is "six billion, three hundred fifty-five million, five hundred thirty-one thousand, three hundred ninety-seven".