43364819 has 2 divisors, whose sum is σ = 43364820. Its totient is φ = 43364818.

The previous prime is 43364779. The next prime is 43364837. The reversal of 43364819 is 91846334.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43364819 is a prime.

It is a super-2 number, since 2×43364819² = 3761015053805522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (43364899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21682409 + 21682410.

It is an arithmetic number, because the mean of its divisors is an integer number (21682410).

Almost surely, 2^43364819 is an apocalyptic number.

43364819 is a deficient number, since it is larger than the sum of its proper divisors (1).

43364819 is an equidigital number, since it uses as much as digits as its factorization.

43364819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 43364819 is about 6585.1969598487. The cubic root of 43364819 is about 351.3277971740.

The spelling of 43364819 in words is "forty-three million, three hundred sixty-four thousand, eight hundred nineteen".