144639701 has 4 divisors (see below), whose sum is σ = 146382432. Its totient is φ = 142896972.

The previous prime is 144639683. The next prime is 144639749. The reversal of 144639701 is 107936441.

144639701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 107936441 = 89 ⋅1212769.

It is a cyclic number.

It is not a de Polignac number, because 144639701 - 2⁶ = 144639637 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 (144639751) 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, 871241 + ... + 871406.

It is an arithmetic number, because the mean of its divisors is an integer number (36595608).

Almost surely, 2^144639701 is an apocalyptic number.

It is an amenable number.

144639701 is a deficient number, since it is larger than the sum of its proper divisors (1742731).

144639701 is an equidigital number, since it uses as much as digits as its factorization.

144639701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742730.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 144639701 is about 12026.6246719518. The cubic root of 144639701 is about 524.9232855406.

The spelling of 144639701 in words is "one hundred forty-four million, six hundred thirty-nine thousand, seven hundred one".