144730693 has 4 divisors (see below), whose sum is σ = 146222860. Its totient is φ = 143238528.

The previous prime is 144730687. The next prime is 144730709. The reversal of 144730693 is 396037441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 396037441 = 59 ⋅6712499.

It can be written as a sum of positive squares in 2 ways, for example, as 40220964 + 104509729 = 6342^2 + 10223^2 .

It is a cyclic number.

It is not a de Polignac number, because 144730693 - 2¹⁷ = 144599621 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 (144730633) 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, 745938 + ... + 746131.

It is an arithmetic number, because the mean of its divisors is an integer number (36555715).

Almost surely, 2^144730693 is an apocalyptic number.

It is an amenable number.

144730693 is a deficient number, since it is larger than the sum of its proper divisors (1492167).

144730693 is an equidigital number, since it uses as much as digits as its factorization.

144730693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492166.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 144730693 is about 12030.4070172210. The cubic root of 144730693 is about 525.0333378679.

The spelling of 144730693 in words is "one hundred forty-four million, seven hundred thirty thousand, six hundred ninety-three".