43430920187 has 4 divisors (see below), whose sum is σ = 45985680216. Its totient is φ = 40876160160.

The previous prime is 43430920151. The next prime is 43430920189. The reversal of 43430920187 is 78102903434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43430920187 - 2¹⁶ = 43430854651 is a prime.

It is a super-2 number, since 2×43430920187² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43430920189) 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, 1277379989 + ... + 1277380022.

It is an arithmetic number, because the mean of its divisors is an integer number (11496420054).

Almost surely, 2^43430920187 is an apocalyptic number.

43430920187 is a deficient number, since it is larger than the sum of its proper divisors (2554760029).

43430920187 is a wasteful number, since it uses less digits than its factorization.

43430920187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554760028.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 43430920187 in words is "forty-three billion, four hundred thirty million, nine hundred twenty thousand, one hundred eighty-seven".