163428987 has 8 divisors (see below), whose sum is σ = 218344000. Its totient is φ = 108733320.

The previous prime is 163428901. The next prime is 163429003. The reversal of 163428987 is 789824361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163428987 - 2²² = 159234683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163428787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53089 + ... + 56082.

It is an arithmetic number, because the mean of its divisors is an integer number (27293000).

Almost surely, 2^163428987 is an apocalyptic number.

163428987 is a deficient number, since it is larger than the sum of its proper divisors (54915013).

163428987 is a wasteful number, since it uses less digits than its factorization.

163428987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109673.

The product of its digits is 580608, while the sum is 48.

The square root of 163428987 is about 12783.9347229247. The cubic root of 163428987 is about 546.7343531514.

The spelling of 163428987 in words is "one hundred sixty-three million, four hundred twenty-eight thousand, nine hundred eighty-seven".