214957397 has 2 divisors, whose sum is σ = 214957398. Its totient is φ = 214957396.

The previous prime is 214957363. The next prime is 214957411. The reversal of 214957397 is 793759412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189090001 + 25867396 = 13751^2 + 5086^2 .

It is a cyclic number.

It is not a de Polignac number, because 214957397 - 2¹⁰ = 214956373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (214957357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107478698 + 107478699.

It is an arithmetic number, because the mean of its divisors is an integer number (107478699).

Almost surely, 2^214957397 is an apocalyptic number.

It is an amenable number.

214957397 is a deficient number, since it is larger than the sum of its proper divisors (1).

214957397 is an equidigital number, since it uses as much as digits as its factorization.

214957397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 47.

The square root of 214957397 is about 14661.4254763989. The cubic root of 214957397 is about 599.0330694310.

The spelling of 214957397 in words is "two hundred fourteen million, nine hundred fifty-seven thousand, three hundred ninety-seven".