213872769 has 24 divisors (see below), whose sum is σ = 345237984. Its totient is φ = 126456000.

The previous prime is 213872723. The next prime is 213872783. The reversal of 213872769 is 967278312.

213872769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213872769 - 2¹³ = 213864577 is a prime.

It is a super-2 number, since 2×213872769² = 91483122639454722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213873769) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22287 + ... + 30404.

It is an arithmetic number, because the mean of its divisors is an integer number (14384916).

Almost surely, 2^213872769 is an apocalyptic number.

It is an amenable number.

213872769 is a deficient number, since it is larger than the sum of its proper divisors (131365215).

213872769 is a wasteful number, since it uses less digits than its factorization.

213872769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52749 (or 52746 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 213872769 is about 14624.3895257204. The cubic root of 213872769 is about 598.0238401326.

The spelling of 213872769 in words is "two hundred thirteen million, eight hundred seventy-two thousand, seven hundred sixty-nine".