145323613 has 4 divisors (see below), whose sum is σ = 145837408. Its totient is φ = 144809820.

The previous prime is 145323587. The next prime is 145323623. The reversal of 145323613 is 316323541.

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: 316323541 = 83 ⋅3811127.

It is a cyclic number.

It is not a de Polignac number, because 145323613 - 2²⁵ = 111769181 is a prime.

It is a super-2 number, since 2×145323613² = 42237904990747538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145323623) 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, 256473 + ... + 257038.

It is an arithmetic number, because the mean of its divisors is an integer number (36459352).

Almost surely, 2^145323613 is an apocalyptic number.

It is an amenable number.

145323613 is a deficient number, since it is larger than the sum of its proper divisors (513795).

145323613 is an equidigital number, since it uses as much as digits as its factorization.

145323613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513794.

The product of its digits is 6480, while the sum is 28.

The square root of 145323613 is about 12055.0243881960. The cubic root of 145323613 is about 525.7493311820.

It can be divided in two parts, 14532 and 3613, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 145323613 in words is "one hundred forty-five million, three hundred twenty-three thousand, six hundred thirteen".