994540709 has 6 divisors (see below), whose sum is σ = 1004908914. Its totient is φ = 984278400.

The previous prime is 994540669. The next prime is 994540721. The reversal of 994540709 is 907045499.

It can be written as a sum of positive squares in 3 ways, for example, as 27144100 + 967396609 = 5210^2 + 31103^2 .

It is not a de Polignac number, because 994540709 - 2⁸ = 994540453 is a prime.

It is a super-2 number, since 2×994540709² = 1978222443716445362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994540739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43442 + ... + 62259.

It is an arithmetic number, because the mean of its divisors is an integer number (167484819).

Almost surely, 2^994540709 is an apocalyptic number.

It is an amenable number.

994540709 is a deficient number, since it is larger than the sum of its proper divisors (10368205).

994540709 is an equidigital number, since it uses as much as digits as its factorization.

994540709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105895 (or 105798 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 994540709 is about 31536.3394990604. The cubic root of 994540709 is about 998.1769147131.

The spelling of 994540709 in words is "nine hundred ninety-four million, five hundred forty thousand, seven hundred nine".