216346693 has 4 divisors (see below), whose sum is σ = 217169568. Its totient is φ = 215523820.

The previous prime is 216346681. The next prime is 216346723. The reversal of 216346693 is 396643612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216346693 - 2⁵ = 216346661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216346643) 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, 411043 + ... + 411568.

It is an arithmetic number, because the mean of its divisors is an integer number (54292392).

Almost surely, 2^216346693 is an apocalyptic number.

It is an amenable number.

216346693 is a deficient number, since it is larger than the sum of its proper divisors (822875).

216346693 is an equidigital number, since it uses as much as digits as its factorization.

216346693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822874.

The product of its digits is 139968, while the sum is 40.

The square root of 216346693 is about 14708.7284630589. The cubic root of 216346693 is about 600.3208404421.

The spelling of 216346693 in words is "two hundred sixteen million, three hundred forty-six thousand, six hundred ninety-three".