144605906 has 4 divisors (see below), whose sum is σ = 216908862. Its totient is φ = 72302952.

The previous prime is 144605897. The next prime is 144605921. The reversal of 144605906 is 609506441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609506441 = 307 ⋅1985363.

It can be written as a sum of positive squares in only one way, i.e., 103530625 + 41075281 = 10175^2 + 6409^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36151475 + ... + 36151478.

Almost surely, 2^144605906 is an apocalyptic number.

144605906 is a deficient number, since it is larger than the sum of its proper divisors (72302956).

144605906 is an equidigital number, since it uses as much as digits as its factorization.

144605906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72302955.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 144605906 is about 12025.2195821947. The cubic root of 144605906 is about 524.8823996609.

The spelling of 144605906 in words is "one hundred forty-four million, six hundred five thousand, nine hundred six".