213667723 has 8 divisors (see below), whose sum is σ = 223597728. Its totient is φ = 203791104.

The previous prime is 213667691. The next prime is 213667759. The reversal of 213667723 is 327766312.

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 213667723 - 2⁵ = 213667691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213665723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5040 + ... + 21277.

It is an arithmetic number, because the mean of its divisors is an integer number (27949716).

Almost surely, 2^213667723 is an apocalyptic number.

213667723 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

213667723 is a deficient number, since it is larger than the sum of its proper divisors (9930005).

213667723 is a wasteful number, since it uses less digits than its factorization.

213667723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26693.

The product of its digits is 63504, while the sum is 37.

The square root of 213667723 is about 14617.3774323577. The cubic root of 213667723 is about 597.8326647826.

The spelling of 213667723 in words is "two hundred thirteen million, six hundred sixty-seven thousand, seven hundred twenty-three".