144370661 has 4 divisors (see below), whose sum is σ = 144487500. Its totient is φ = 144253824.

The previous prime is 144370657. The next prime is 144370673. The reversal of 144370661 is 166073441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166073441 = 3643 ⋅45587.

It can be written as a sum of positive squares in 2 ways, for example, as 97022500 + 47348161 = 9850^2 + 6881^2 .

It is a cyclic number.

It is not a de Polignac number, because 144370661 - 2² = 144370657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144370621) 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, 56546 + ... + 59043.

It is an arithmetic number, because the mean of its divisors is an integer number (36121875).

Almost surely, 2^144370661 is an apocalyptic number.

It is an amenable number.

144370661 is a deficient number, since it is larger than the sum of its proper divisors (116839).

144370661 is a wasteful number, since it uses less digits than its factorization.

144370661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116838.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 144370661 is about 12015.4342826217. The cubic root of 144370661 is about 524.5976188129.

The spelling of 144370661 in words is "one hundred forty-four million, three hundred seventy thousand, six hundred sixty-one".