42949213 has 4 divisors (see below), whose sum is σ = 42990460. Its totient is φ = 42907968.

The previous prime is 42949199. The next prime is 42949223. The reversal of 42949213 is 31294924.

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 32012964 + 10936249 = 5658^2 + 3307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42949213 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 (42949223) 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, 19020 + ... + 21157.

It is an arithmetic number, because the mean of its divisors is an integer number (10747615).

Almost surely, 2^42949213 is an apocalyptic number.

It is an amenable number.

42949213 is a deficient number, since it is larger than the sum of its proper divisors (41247).

42949213 is a wasteful number, since it uses less digits than its factorization.

42949213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41246.

The product of its digits is 15552, while the sum is 34.

The square root of 42949213 is about 6553.5649077430. The cubic root of 42949213 is about 350.2018237342.

It can be divided in two parts, 4294921 and 3, that added together give a palindrome (4294924).

The spelling of 42949213 in words is "forty-two million, nine hundred forty-nine thousand, two hundred thirteen".