213789465 has 12 divisors (see below), whose sum is σ = 370568484. Its totient is φ = 114021024.

The previous prime is 213789437. The next prime is 213789469. The reversal of 213789465 is 564987312.

It can be written as a sum of positive squares in 2 ways, for example, as 154853136 + 58936329 = 12444^2 + 7677^2 .

It is not a de Polignac number, because 213789465 - 2¹⁰ = 213788441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4750877 = 213789465 / (2 + 1 + 3 + 7 + 8 + 9 + 4 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 213789465.

It is not an unprimeable number, because it can be changed into a prime (213789469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2375394 + ... + 2375483.

It is an arithmetic number, because the mean of its divisors is an integer number (30880707).

Almost surely, 2^213789465 is an apocalyptic number.

It is an amenable number.

213789465 is a deficient number, since it is larger than the sum of its proper divisors (156779019).

213789465 is a wasteful number, since it uses less digits than its factorization.

213789465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4750888 (or 4750885 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 213789465 is about 14621.5411294432. The cubic root of 213789465 is about 597.9461861024.

The spelling of 213789465 in words is "two hundred thirteen million, seven hundred eighty-nine thousand, four hundred sixty-five".