43742957 has 2 divisors, whose sum is σ = 43742958. Its totient is φ = 43742956.

The previous prime is 43742929. The next prime is 43742969. The reversal of 43742957 is 75924734.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43705321 + 37636 = 6611^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 43742957 - 2¹⁶ = 43677421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43742977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21871478 + 21871479.

It is an arithmetic number, because the mean of its divisors is an integer number (21871479).

Almost surely, 2^43742957 is an apocalyptic number.

It is an amenable number.

43742957 is a deficient number, since it is larger than the sum of its proper divisors (1).

43742957 is an equidigital number, since it uses as much as digits as its factorization.

43742957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 41.

The square root of 43742957 is about 6613.8458554762. The cubic root of 43742957 is about 352.3460273504.

The spelling of 43742957 in words is "forty-three million, seven hundred forty-two thousand, nine hundred fifty-seven".