216769933 has 2 divisors, whose sum is σ = 216769934. Its totient is φ = 216769932.

The previous prime is 216769901. The next prime is 216769961. The reversal of 216769933 is 339967612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147331044 + 69438889 = 12138^2 + 8333^2 .

It is a cyclic number.

It is not a de Polignac number, because 216769933 - 2⁵ = 216769901 is a prime.

It is a super-4 number, since 4×216769933⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216769433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108384966 + 108384967.

It is an arithmetic number, because the mean of its divisors is an integer number (108384967).

Almost surely, 2^216769933 is an apocalyptic number.

It is an amenable number.

216769933 is a deficient number, since it is larger than the sum of its proper divisors (1).

216769933 is an equidigital number, since it uses as much as digits as its factorization.

216769933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 46.

The square root of 216769933 is about 14723.1088089439. The cubic root of 216769933 is about 600.7120555531.

The spelling of 216769933 in words is "two hundred sixteen million, seven hundred sixty-nine thousand, nine hundred thirty-three".