994920639 has 8 divisors (see below), whose sum is σ = 1362414000. Its totient is φ = 645353856.

The previous prime is 994920629. The next prime is 994920643. The reversal of 994920639 is 936029499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 994920639 - 2⁵ = 994920607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 994920591 and 994920600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994920629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4481514 + ... + 4481735.

It is an arithmetic number, because the mean of its divisors is an integer number (170301750).

Almost surely, 2^994920639 is an apocalyptic number.

994920639 is a deficient number, since it is larger than the sum of its proper divisors (367493361).

994920639 is a wasteful number, since it uses less digits than its factorization.

994920639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8963289.

The product of its (nonzero) digits is 944784, while the sum is 51.

The square root of 994920639 is about 31542.3626096715. The cubic root of 994920639 is about 998.3040048934.

The spelling of 994920639 in words is "nine hundred ninety-four million, nine hundred twenty thousand, six hundred thirty-nine".