994973645 has 4 divisors (see below), whose sum is σ = 1193968380. Its totient is φ = 795978912.

The previous prime is 994973641. The next prime is 994973657. The reversal of 994973645 is 546379499.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 399760036 + 595213609 = 19994^2 + 24397^2 .

It is a cyclic number.

It is not a de Polignac number, because 994973645 - 2² = 994973641 is a prime.

It is a super-3 number, since 3×994973645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994973641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99497360 + ... + 99497369.

It is an arithmetic number, because the mean of its divisors is an integer number (298492095).

Almost surely, 2^994973645 is an apocalyptic number.

It is an amenable number.

994973645 is a deficient number, since it is larger than the sum of its proper divisors (198994735).

994973645 is a wasteful number, since it uses less digits than its factorization.

994973645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198994734.

The product of its digits is 7348320, while the sum is 56.

The square root of 994973645 is about 31543.2028335741. The cubic root of 994973645 is about 998.3217333300.

The spelling of 994973645 in words is "nine hundred ninety-four million, nine hundred seventy-three thousand, six hundred forty-five".