494999987 has 2 divisors, whose sum is σ = 494999988. Its totient is φ = 494999986.

The previous prime is 494999983. The next prime is 495000041. The reversal of 494999987 is 789999494.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 494999987 - 2² = 494999983 is a prime.

It is not a weakly prime, because it can be changed into another prime (494999983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247499993 + 247499994.

It is an arithmetic number, because the mean of its divisors is an integer number (247499994).

Almost surely, 2^494999987 is an apocalyptic number.

494999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

494999987 is an equidigital number, since it uses as much as digits as its factorization.

494999987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52907904, while the sum is 68.

The square root of 494999987 is about 22248.5951691337. The cubic root of 494999987 is about 791.0459824215.

The spelling of 494999987 in words is "four hundred ninety-four million, nine hundred ninety-nine thousand, nine hundred eighty-seven".