83578399 has 2 divisors, whose sum is σ = 83578400. Its totient is φ = 83578398.

The previous prime is 83578381. The next prime is 83578433. The reversal of 83578399 is 99387538.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83578399 - 2⁵ = 83578367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83578699) 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, 41789199 + 41789200.

It is an arithmetic number, because the mean of its divisors is an integer number (41789200).

Almost surely, 2^83578399 is an apocalyptic number.

83578399 is a deficient number, since it is larger than the sum of its proper divisors (1).

83578399 is an equidigital number, since it uses as much as digits as its factorization.

83578399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 52.

The square root of 83578399 is about 9142.1222372051. The cubic root of 83578399 is about 437.2179824922.

The spelling of 83578399 in words is "eighty-three million, five hundred seventy-eight thousand, three hundred ninety-nine".