212807747 has 8 divisors (see below), whose sum is σ = 214630080. Its totient is φ = 210992040.

The previous prime is 212807737. The next prime is 212807789. The reversal of 212807747 is 747708212.

It is a happy number.

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 212807747 - 2¹² = 212803651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212807747.

It is not an unprimeable number, because it can be changed into a prime (212807737) 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, 78704 + ... + 81362.

It is an arithmetic number, because the mean of its divisors is an integer number (26828760).

Almost surely, 2^212807747 is an apocalyptic number.

212807747 is a deficient number, since it is larger than the sum of its proper divisors (1822333).

212807747 is a wasteful number, since it uses less digits than its factorization.

212807747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 212807747 is about 14587.9315531709. The cubic root of 212807747 is about 597.0295282839.

The spelling of 212807747 in words is "two hundred twelve million, eight hundred seven thousand, seven hundred forty-seven".