144147931 has 4 divisors (see below), whose sum is σ = 144316600. Its totient is φ = 143979264.

The previous prime is 144147929. The next prime is 144147937. The reversal of 144147931 is 139741441.

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 144147931 - 2¹ = 144147929 is a prime.

It is a super-2 number, since 2×144147931² = 41557252023161522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144147937) 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, 83046 + ... + 84763.

It is an arithmetic number, because the mean of its divisors is an integer number (36079150).

Almost surely, 2^144147931 is an apocalyptic number.

144147931 is a deficient number, since it is larger than the sum of its proper divisors (168669).

144147931 is an equidigital number, since it uses as much as digits as its factorization.

144147931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168668.

The product of its digits is 12096, while the sum is 34.

The square root of 144147931 is about 12006.1622094656. The cubic root of 144147931 is about 524.3277030147.

The spelling of 144147931 in words is "one hundred forty-four million, one hundred forty-seven thousand, nine hundred thirty-one".