214308997 has 6 divisors (see below), whose sum is σ = 249298278. Its totient is φ = 183693384.

The previous prime is 214308989. The next prime is 214309001. The reversal of 214308997 is 799803412.

It can be written as a sum of positive squares in only one way, i.e., 191517921 + 22791076 = 13839^2 + 4774^2 .

It is not a de Polignac number, because 214308997 - 2³ = 214308989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214308967) 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 in 5 ways as a sum of consecutive naturals, for example, 2186778 + ... + 2186875.

It is an arithmetic number, because the mean of its divisors is an integer number (41549713).

Almost surely, 2^214308997 is an apocalyptic number.

It is an amenable number.

214308997 is a deficient number, since it is larger than the sum of its proper divisors (34989281).

214308997 is an equidigital number, since it uses as much as digits as its factorization.

214308997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4373667 (or 4373660 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 214308997 is about 14639.2963287174. The cubic root of 214308997 is about 598.4301526961.

The spelling of 214308997 in words is "two hundred fourteen million, three hundred eight thousand, nine hundred ninety-seven".