994004131 has 2 divisors, whose sum is σ = 994004132. Its totient is φ = 994004130.

The previous prime is 994004129. The next prime is 994004173. The reversal of 994004131 is 131400499.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 994004131 - 2¹ = 994004129 is a prime.

It is a super-2 number, since 2×994004131² = 1976088424890130322, which contains 22 as substring.

Together with 994004129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 994004093 and 994004102.

It is not a weakly prime, because it can be changed into another prime (994004101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497002065 + 497002066.

It is an arithmetic number, because the mean of its divisors is an integer number (497002066).

Almost surely, 2^994004131 is an apocalyptic number.

994004131 is a deficient number, since it is larger than the sum of its proper divisors (1).

994004131 is an equidigital number, since it uses as much as digits as its factorization.

994004131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 994004131 is about 31527.8310544826. The cubic root of 994004131 is about 997.9973691469.

The spelling of 994004131 in words is "nine hundred ninety-four million, four thousand, one hundred thirty-one".