212723803 has 4 divisors (see below), whose sum is σ = 221972688. Its totient is φ = 203474920.

The previous prime is 212723789. The next prime is 212723809. The reversal of 212723803 is 308327212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212723803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212723809) 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, 4624408 + ... + 4624453.

It is an arithmetic number, because the mean of its divisors is an integer number (55493172).

Almost surely, 2^212723803 is an apocalyptic number.

212723803 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

212723803 is a deficient number, since it is larger than the sum of its proper divisors (9248885).

212723803 is an equidigital number, since it uses as much as digits as its factorization.

212723803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9248884.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 212723803 is about 14585.0540965743. The cubic root of 212723803 is about 596.9510166717.

The spelling of 212723803 in words is "two hundred twelve million, seven hundred twenty-three thousand, eight hundred three".