145109819 has 8 divisors (see below), whose sum is σ = 150210048. Its totient is φ = 140071680.

The previous prime is 145109779. The next prime is 145109843. The reversal of 145109819 is 918901541.

145109819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145109819 - 2²⁰ = 144061243 is a prime.

It is a super-2 number, since 2×145109819² = 42113719140425522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145109849) 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, 10742 + ... + 20139.

It is an arithmetic number, because the mean of its divisors is an integer number (18776256).

Almost surely, 2^145109819 is an apocalyptic number.

145109819 is a deficient number, since it is larger than the sum of its proper divisors (5100229).

145109819 is a wasteful number, since it uses less digits than its factorization.

145109819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31045.

The product of its (nonzero) digits is 12960, while the sum is 38.

The square root of 145109819 is about 12046.1537014933. The cubic root of 145109819 is about 525.4913845307.

The spelling of 145109819 in words is "one hundred forty-five million, one hundred nine thousand, eight hundred nineteen".