994920381 has 64 divisors (see below), whose sum is σ = 1821388800. Its totient is φ = 522687168.

The previous prime is 994920379. The next prime is 994920401. The reversal of 994920381 is 183029499.

It is not a de Polignac number, because 994920381 - 2¹ = 994920379 is a prime.

It is a super-2 number, since 2×994920381² = 1979733129058370322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994920301) 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 63 ways as a sum of consecutive naturals, for example, 753640 + ... + 754958.

It is an arithmetic number, because the mean of its divisors is an integer number (28459200).

Almost surely, 2^994920381 is an apocalyptic number.

994920381 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

994920381 is a deficient number, since it is larger than the sum of its proper divisors (826468419).

994920381 is a wasteful number, since it uses less digits than its factorization.

994920381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 994920381 is about 31542.3585199332. The cubic root of 994920381 is about 998.3039186009.

The spelling of 994920381 in words is "nine hundred ninety-four million, nine hundred twenty thousand, three hundred eighty-one".