43970161 has 9 divisors (see below), whose sum is σ = 46539531. Its totient is φ = 41536584.

The previous prime is 43970153. The next prime is 43970191. The reversal of 43970161 is 16107934.

It is a happy number.

The square root of 43970161 is 6631.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 32273761 + 11696400 = 5681^2 + 3420^2 .

It is not a de Polignac number, because 43970161 - 2³ = 43970153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43970111) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 125815 + ... + 126163.

It is an arithmetic number, because the mean of its divisors is an integer number (5171059).

Almost surely, 2^43970161 is an apocalyptic number.

43970161 is the 6631-st square number.

43970161 is the 3316-th centered octagonal number.

It is an amenable number.

43970161 is a deficient number, since it is larger than the sum of its proper divisors (2569370).

43970161 is an frugal number, since it uses more digits than its factorization.

43970161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The cubic root of 43970161 is about 352.9550108918.

The spelling of 43970161 in words is "forty-three million, nine hundred seventy thousand, one hundred sixty-one".