145890443 has 4 divisors (see below), whose sum is σ = 149283288. Its totient is φ = 142497600.

The previous prime is 145890439. The next prime is 145890457. The reversal of 145890443 is 344098541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344098541 = 277 ⋅1242233.

It is a cyclic number.

It is not a de Polignac number, because 145890443 - 2² = 145890439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145890397 and 145890406.

It is not an unprimeable number, because it can be changed into a prime (145890463) 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, 1696358 + ... + 1696443.

It is an arithmetic number, because the mean of its divisors is an integer number (37320822).

Almost surely, 2^145890443 is an apocalyptic number.

145890443 is a deficient number, since it is larger than the sum of its proper divisors (3392845).

145890443 is an equidigital number, since it uses as much as digits as its factorization.

145890443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392844.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 145890443 is about 12078.5116218845. The cubic root of 145890443 is about 526.4320003978.

The spelling of 145890443 in words is "one hundred forty-five million, eight hundred ninety thousand, four hundred forty-three".