29813213 has 4 divisors (see below), whose sum is σ = 29830140. Its totient is φ = 29796288.

The previous prime is 29813209. The next prime is 29813219. The reversal of 29813213 is 31231892.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11648569 + 18164644 = 3413^2 + 4262^2 .

It is a cyclic number.

It is not a de Polignac number, because 29813213 - 2² = 29813209 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 (29813219) 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, 5468 + ... + 9461.

It is an arithmetic number, because the mean of its divisors is an integer number (7457535).

Almost surely, 2^29813213 is an apocalyptic number.

It is an amenable number.

29813213 is a deficient number, since it is larger than the sum of its proper divisors (16927).

29813213 is a wasteful number, since it uses less digits than its factorization.

29813213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16926.

The product of its digits is 2592, while the sum is 29.

The square root of 29813213 is about 5460.1477086247. The cubic root of 29813213 is about 310.0770290718.

The spelling of 29813213 in words is "twenty-nine million, eight hundred thirteen thousand, two hundred thirteen".