147923987 has 16 divisors (see below), whose sum is σ = 165975840. Its totient is φ = 131010048.

The previous prime is 147923981. The next prime is 147924019. The reversal of 147923987 is 789329741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147923987 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147923981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49253 + ... + 52169.

It is an arithmetic number, because the mean of its divisors is an integer number (10373490).

Almost surely, 2^147923987 is an apocalyptic number.

147923987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

147923987 is a deficient number, since it is larger than the sum of its proper divisors (18051853).

147923987 is a wasteful number, since it uses less digits than its factorization.

147923987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110.

The product of its digits is 762048, while the sum is 50.

The square root of 147923987 is about 12162.4005443005. The cubic root of 147923987 is about 528.8666740425.

The spelling of 147923987 in words is "one hundred forty-seven million, nine hundred twenty-three thousand, nine hundred eighty-seven".