212394139 has 8 divisors (see below), whose sum is σ = 215747280. Its totient is φ = 209062656.

The previous prime is 212394031. The next prime is 212394151. The reversal of 212394139 is 931493212.

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 212394139 - 2²⁷ = 78176411 is a prime.

It is a super-2 number, since 2×212394139² = 90222540563102642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212394439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14947 + ... + 25459.

It is an arithmetic number, because the mean of its divisors is an integer number (26968410).

Almost surely, 2^212394139 is an apocalyptic number.

212394139 is a deficient number, since it is larger than the sum of its proper divisors (3353141).

212394139 is a wasteful number, since it uses less digits than its factorization.

212394139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10829.

The product of its digits is 11664, while the sum is 34.

The square root of 212394139 is about 14573.7482824426. The cubic root of 212394139 is about 596.6424867008.

The spelling of 212394139 in words is "two hundred twelve million, three hundred ninety-four thousand, one hundred thirty-nine".