145609643 has 4 divisors (see below), whose sum is σ = 145637808. Its totient is φ = 145581480.

The previous prime is 145609631. The next prime is 145609649. The reversal of 145609643 is 346906541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346906541 = 19 ⋅18258239.

It is a cyclic number.

It is not a de Polignac number, because 145609643 - 2⁴ = 145609627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145609597 and 145609606.

It is not an unprimeable number, because it can be changed into a prime (145609649) 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, 3848 + ... + 17493.

It is an arithmetic number, because the mean of its divisors is an integer number (36409452).

Almost surely, 2^145609643 is an apocalyptic number.

145609643 is a deficient number, since it is larger than the sum of its proper divisors (28165).

145609643 is an equidigital number, since it uses as much as digits as its factorization.

145609643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28164.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 145609643 is about 12066.8820745046. The cubic root of 145609643 is about 526.0940366410.

The spelling of 145609643 in words is "one hundred forty-five million, six hundred nine thousand, six hundred forty-three".