993864399 has 32 divisors (see below), whose sum is σ = 1491452160. Its totient is φ = 583545600.

The previous prime is 993864373. The next prime is 993864449. The reversal of 993864399 is 993468399.

It is not a de Polignac number, because 993864399 - 2¹³ = 993856207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993864349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131187 + ... + 138555.

It is an arithmetic number, because the mean of its divisors is an integer number (46607880).

Almost surely, 2^993864399 is an apocalyptic number.

993864399 is a deficient number, since it is larger than the sum of its proper divisors (497587761).

993864399 is a wasteful number, since it uses less digits than its factorization.

993864399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7511.

The product of its digits is 11337408, while the sum is 60.

The square root of 993864399 is about 31525.6149662461. The cubic root of 993864399 is about 997.9506025058.

The spelling of 993864399 in words is "nine hundred ninety-three million, eight hundred sixty-four thousand, three hundred ninety-nine".