145117919 has 8 divisors (see below), whose sum is σ = 146332032. Its totient is φ = 143909280.

The previous prime is 145117873. The next prime is 145117939. The reversal of 145117919 is 919711541.

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 145117919 - 2¹² = 145113823 is a prime.

It is a super-2 number, since 2×145117919² = 42118420829781122, 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 (145117939) 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, 64229 + ... + 66449.

It is an arithmetic number, because the mean of its divisors is an integer number (18291504).

Almost surely, 2^145117919 is an apocalyptic number.

145117919 is a deficient number, since it is larger than the sum of its proper divisors (1214113).

145117919 is a wasteful number, since it uses less digits than its factorization.

145117919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737.

The product of its digits is 11340, while the sum is 38.

The square root of 145117919 is about 12046.4899037022. The cubic root of 145117919 is about 525.5011619555.

The spelling of 145117919 in words is "one hundred forty-five million, one hundred seventeen thousand, nine hundred nineteen".