994973909 has 8 divisors (see below), whose sum is σ = 1063168920. Its totient is φ = 927853056.

The previous prime is 994973899. The next prime is 994973939. The reversal of 994973909 is 909379499.

It can be written as a sum of positive squares in 4 ways, for example, as 189833284 + 805140625 = 13778^2 + 28375^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 994973909 - 2¹² = 994969813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994973939) 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, 266624 + ... + 270329.

It is an arithmetic number, because the mean of its divisors is an integer number (132896115).

Almost surely, 2^994973909 is an apocalyptic number.

It is an amenable number.

994973909 is a deficient number, since it is larger than the sum of its proper divisors (68195011).

994973909 is a wasteful number, since it uses less digits than its factorization.

994973909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537079.

The product of its (nonzero) digits is 4960116, while the sum is 59.

The square root of 994973909 is about 31543.2070183106. The cubic root of 994973909 is about 998.3218216261.

The spelling of 994973909 in words is "nine hundred ninety-four million, nine hundred seventy-three thousand, nine hundred nine".