144590991 has 8 divisors (see below), whose sum is σ = 193397424. Its totient is φ = 96089280.

The previous prime is 144590989. The next prime is 144590993. The reversal of 144590991 is 199095441.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (144590989) and next prime (144590993).

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

It is not a de Polignac number, because 144590991 - 2¹ = 144590989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144590993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75070 + ... + 76971.

It is an arithmetic number, because the mean of its divisors is an integer number (24174678).

Almost surely, 2^144590991 is an apocalyptic number.

144590991 is a deficient number, since it is larger than the sum of its proper divisors (48806433).

144590991 is a wasteful number, since it uses less digits than its factorization.

144590991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152361.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 144590991 is about 12024.5994112070. The cubic root of 144590991 is about 524.8643531639.

The spelling of 144590991 in words is "one hundred forty-four million, five hundred ninety thousand, nine hundred ninety-one".