145689013 has 4 divisors (see below), whose sum is σ = 145781280. Its totient is φ = 145596748.

The previous prime is 145689007. The next prime is 145689023. The reversal of 145689013 is 310986541.

145689013 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145689013 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 (145689023) 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, 43723 + ... + 46936.

It is an arithmetic number, because the mean of its divisors is an integer number (36445320).

Almost surely, 2^145689013 is an apocalyptic number.

It is an amenable number.

145689013 is a deficient number, since it is larger than the sum of its proper divisors (92267).

145689013 is an equidigital number, since it uses as much as digits as its factorization.

145689013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92266.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 145689013 is about 12070.1703799077. The cubic root of 145689013 is about 526.1896083770.

The spelling of 145689013 in words is "one hundred forty-five million, six hundred eighty-nine thousand, thirteen".