83770399 has 2 divisors, whose sum is σ = 83770400. Its totient is φ = 83770398.

The previous prime is 83770391. The next prime is 83770409. The reversal of 83770399 is 99307738.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 83770399 - 2³ = 83770391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83770391) 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, 41885199 + 41885200.

It is an arithmetic number, because the mean of its divisors is an integer number (41885200).

Almost surely, 2^83770399 is an apocalyptic number.

83770399 is a deficient number, since it is larger than the sum of its proper divisors (1).

83770399 is an equidigital number, since it uses as much as digits as its factorization.

83770399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 83770399 is about 9152.6170574323. The cubic root of 83770399 is about 437.5525252855.

The spelling of 83770399 in words is "eighty-three million, seven hundred seventy thousand, three hundred ninety-nine".