212403707 has 4 divisors (see below), whose sum is σ = 214506816. Its totient is φ = 210300600.

The previous prime is 212403677. The next prime is 212403721. The reversal of 212403707 is 707304212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212403707 - 2¹⁴ = 212387323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212403767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051403 + ... + 1051604.

It is an arithmetic number, because the mean of its divisors is an integer number (53626704).

Almost surely, 2^212403707 is an apocalyptic number.

212403707 is a deficient number, since it is larger than the sum of its proper divisors (2103109).

212403707 is a wasteful number, since it uses less digits than its factorization.

212403707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103108.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 212403707 is about 14574.0765402134. The cubic root of 212403707 is about 596.6514458143.

Adding to 212403707 its reverse (707304212), we get a palindrome (919707919).

The spelling of 212403707 in words is "two hundred twelve million, four hundred three thousand, seven hundred seven".