43919161 has 16 divisors (see below), whose sum is σ = 51791040. Its totient is φ = 36717120.

The previous prime is 43919149. The next prime is 43919173. The reversal of 43919161 is 16191934.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43919149) and next prime (43919173).

It is not a de Polignac number, because 43919161 - 2⁵ = 43919129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43919131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59551 + ... + 60283.

It is an arithmetic number, because the mean of its divisors is an integer number (3236940).

Almost surely, 2^43919161 is an apocalyptic number.

It is an amenable number.

43919161 is a deficient number, since it is larger than the sum of its proper divisors (7871879).

43919161 is a wasteful number, since it uses less digits than its factorization.

43919161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its digits is 5832, while the sum is 34.

The square root of 43919161 is about 6627.1533104343. The cubic root of 43919161 is about 352.8184965741.

It can be divided in two parts, 439 and 19161, that added together give a square (19600 = 140²).

The spelling of 43919161 in words is "forty-three million, nine hundred nineteen thousand, one hundred sixty-one".