145686919 has 8 divisors (see below), whose sum is σ = 168216608. Its totient is φ = 123586560.

The previous prime is 145686917. The next prime is 145686941. The reversal of 145686919 is 919686541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145686919 - 2¹ = 145686917 is a prime.

It is a super-2 number, since 2×145686919² = 42449356735425122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145686911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106602 + ... + 107959.

It is an arithmetic number, because the mean of its divisors is an integer number (21027076).

Almost surely, 2^145686919 is an apocalyptic number.

145686919 is a deficient number, since it is larger than the sum of its proper divisors (22529689).

145686919 is an equidigital number, since it uses as much as digits as its factorization.

145686919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214665.

The product of its digits is 466560, while the sum is 49.

The square root of 145686919 is about 12070.0836368270. The cubic root of 145686919 is about 526.1870873763.

The spelling of 145686919 in words is "one hundred forty-five million, six hundred eighty-six thousand, nine hundred nineteen".