43477421 has 4 divisors (see below), whose sum is σ = 46821852. Its totient is φ = 40132992.

The previous prime is 43477403. The next prime is 43477451. The reversal of 43477421 is 12477434.

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 7645225 + 35832196 = 2765^2 + 5986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43477421 is a prime.

It is a super-2 number, since 2×43477421² = 3780572273622482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43477451) 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, 1672196 + ... + 1672221.

It is an arithmetic number, because the mean of its divisors is an integer number (11705463).

Almost surely, 2^43477421 is an apocalyptic number.

It is an amenable number.

43477421 is a deficient number, since it is larger than the sum of its proper divisors (3344431).

43477421 is a wasteful number, since it uses less digits than its factorization.

43477421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344430.

The product of its digits is 18816, while the sum is 32.

The square root of 43477421 is about 6593.7410473873. The cubic root of 43477421 is about 351.6316227318.

The spelling of 43477421 in words is "forty-three million, four hundred seventy-seven thousand, four hundred twenty-one".