144315987 has 4 divisors (see below), whose sum is σ = 192421320. Its totient is φ = 96210656.

The previous prime is 144315973. The next prime is 144315989. The reversal of 144315987 is 789513441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144315987 - 2¹² = 144311891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144315989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24052662 + ... + 24052667.

It is an arithmetic number, because the mean of its divisors is an integer number (48105330).

Almost surely, 2^144315987 is an apocalyptic number.

144315987 is a deficient number, since it is larger than the sum of its proper divisors (48105333).

144315987 is an equidigital number, since it uses as much as digits as its factorization.

144315987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48105332.

The product of its digits is 120960, while the sum is 42.

The square root of 144315987 is about 12013.1589101285. The cubic root of 144315987 is about 524.5313877393.

The spelling of 144315987 in words is "one hundred forty-four million, three hundred fifteen thousand, nine hundred eighty-seven".