43629961 has 4 divisors (see below), whose sum is σ = 43973632. Its totient is φ = 43286292.

The previous prime is 43629941. The next prime is 43629967. The reversal of 43629961 is 16992634.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43629961 - 2⁹ = 43629449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43629967) 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, 171645 + ... + 171898.

It is an arithmetic number, because the mean of its divisors is an integer number (10993408).

Almost surely, 2^43629961 is an apocalyptic number.

It is an amenable number.

43629961 is a deficient number, since it is larger than the sum of its proper divisors (343671).

43629961 is a wasteful number, since it uses less digits than its factorization.

43629961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343670.

The product of its digits is 69984, while the sum is 40.

The square root of 43629961 is about 6605.2979493737. The cubic root of 43629961 is about 352.0423744829.

The spelling of 43629961 in words is "forty-three million, six hundred twenty-nine thousand, nine hundred sixty-one".