994942537 has 4 divisors (see below), whose sum is σ = 995277076. Its totient is φ = 994608000.

The previous prime is 994942439. The next prime is 994942541. The reversal of 994942537 is 735249499.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 735249499 = 29 ⋅25353431.

It can be written as a sum of positive squares in 2 ways, for example, as 355661881 + 639280656 = 18859^2 + 25284^2 .

It is a cyclic number.

It is not a de Polignac number, because 994942537 - 2¹¹ = 994940489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994942937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162768 + ... + 168769.

It is an arithmetic number, because the mean of its divisors is an integer number (248819269).

Almost surely, 2^994942537 is an apocalyptic number.

It is an amenable number.

994942537 is a deficient number, since it is larger than the sum of its proper divisors (334539).

994942537 is a wasteful number, since it uses less digits than its factorization.

994942537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334538.

The product of its digits is 2449440, while the sum is 52.

The square root of 994942537 is about 31542.7097282399. The cubic root of 994942537 is about 998.3113289954.

The spelling of 994942537 in words is "nine hundred ninety-four million, nine hundred forty-two thousand, five hundred thirty-seven".