212739307 has 16 divisors (see below), whose sum is σ = 239323392. Its totient is φ = 187405920.

The previous prime is 212739277. The next prime is 212739341. The reversal of 212739307 is 703937212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212739307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212739347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114258 + ... + 116104.

It is an arithmetic number, because the mean of its divisors is an integer number (14957712).

Almost surely, 2^212739307 is an apocalyptic number.

212739307 is a deficient number, since it is larger than the sum of its proper divisors (26584085).

212739307 is a wasteful number, since it uses less digits than its factorization.

212739307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 212739307 is about 14585.5855898898. The cubic root of 212739307 is about 596.9655188942.

The spelling of 212739307 in words is "two hundred twelve million, seven hundred thirty-nine thousand, three hundred seven".