212780039 has 8 divisors (see below), whose sum is σ = 218697600. Its totient is φ = 206906616.

The previous prime is 212780023. The next prime is 212780077. The reversal of 212780039 is 930087212.

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 212780039 - 2⁴ = 212780023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212779987 and 212780014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212780339) 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, 1139 + ... + 20660.

It is an arithmetic number, because the mean of its divisors is an integer number (27337200).

Almost surely, 2^212780039 is an apocalyptic number.

212780039 is a deficient number, since it is larger than the sum of its proper divisors (5917561).

212780039 is a wasteful number, since it uses less digits than its factorization.

212780039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22069.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 212780039 is about 14586.9818331278. The cubic root of 212780039 is about 597.0036156743.

The spelling of 212780039 in words is "two hundred twelve million, seven hundred eighty thousand, thirty-nine".