144147994 has 8 divisors (see below), whose sum is σ = 216422388. Its totient is φ = 72007200.

The previous prime is 144147989. The next prime is 144148007. The reversal of 144147994 is 499741441.

It can be written as a sum of positive squares in 2 ways, for example, as 139546969 + 4601025 = 11813^2 + 2145^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 144147994.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30657 + ... + 35044.

Almost surely, 2^144147994 is an apocalyptic number.

144147994 is a deficient number, since it is larger than the sum of its proper divisors (72274394).

144147994 is a wasteful number, since it uses less digits than its factorization.

144147994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66800.

The product of its digits is 145152, while the sum is 43.

The square root of 144147994 is about 12006.1648331180. The cubic root of 144147994 is about 524.3277794007.

The spelling of 144147994 in words is "one hundred forty-four million, one hundred forty-seven thousand, nine hundred ninety-four".