212449397 has 8 divisors (see below), whose sum is σ = 216178872. Its totient is φ = 208728000.

The previous prime is 212449361. The next prime is 212449403. The reversal of 212449397 is 793944212.

It can be written as a sum of positive squares in 4 ways, for example, as 69072721 + 143376676 = 8311^2 + 11974^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212449397 - 2⁶ = 212449333 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 (212449297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78023 + ... + 80699.

It is an arithmetic number, because the mean of its divisors is an integer number (27022359).

Almost surely, 2^212449397 is an apocalyptic number.

It is an amenable number.

212449397 is a deficient number, since it is larger than the sum of its proper divisors (3729475).

212449397 is a wasteful number, since it uses less digits than its factorization.

212449397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039.

The product of its digits is 108864, while the sum is 41.

The square root of 212449397 is about 14575.6439651907. The cubic root of 212449397 is about 596.6942244935.

The spelling of 212449397 in words is "two hundred twelve million, four hundred forty-nine thousand, three hundred ninety-seven".