43989151 has 2 divisors, whose sum is σ = 43989152. Its totient is φ = 43989150.

The previous prime is 43989131. The next prime is 43989157. The reversal of 43989151 is 15198934.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43989151 - 2⁵ = 43989119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43989157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21994575 + 21994576.

It is an arithmetic number, because the mean of its divisors is an integer number (21994576).

Almost surely, 2^43989151 is an apocalyptic number.

43989151 is a deficient number, since it is larger than the sum of its proper divisors (1).

43989151 is an equidigital number, since it uses as much as digits as its factorization.

43989151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 43989151 is about 6632.4317561510. The cubic root of 43989151 is about 353.0058154285.

The spelling of 43989151 in words is "forty-three million, nine hundred eighty-nine thousand, one hundred fifty-one".