994991501 has 12 divisors (see below), whose sum is σ = 1168904700. Its totient is φ = 844401600.

The previous prime is 994991497. The next prime is 994991507. The reversal of 994991501 is 105199499.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 800946601 + 194044900 = 28301^2 + 13930^2 .

It is not a de Polignac number, because 994991501 - 2² = 994991497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994991507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95576 + ... + 105473.

It is an arithmetic number, because the mean of its divisors is an integer number (97408725).

Almost surely, 2^994991501 is an apocalyptic number.

It is an amenable number.

994991501 is a deficient number, since it is larger than the sum of its proper divisors (173913199).

994991501 is a wasteful number, since it uses less digits than its factorization.

994991501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201164 (or 201157 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 47.

The square root of 994991501 is about 31543.4858726806. The cubic root of 994991501 is about 998.3277053227.

The spelling of 994991501 in words is "nine hundred ninety-four million, nine hundred ninety-one thousand, five hundred one".