145999717 has 8 divisors (see below), whose sum is σ = 151912440. Its totient is φ = 140145600.

The previous prime is 145999703. The next prime is 145999727. The reversal of 145999717 is 717999541.

It can be written as a sum of positive squares in 4 ways, for example, as 12574116 + 133425601 = 3546^2 + 11551^2 .

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 145999717 - 2²³ = 137611109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145999727) 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, 9534 + ... + 19567.

It is an arithmetic number, because the mean of its divisors is an integer number (18989055).

Almost surely, 2^145999717 is an apocalyptic number.

It is an amenable number.

145999717 is a deficient number, since it is larger than the sum of its proper divisors (5912723).

145999717 is a wasteful number, since it uses less digits than its factorization.

145999717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29303.

The product of its digits is 714420, while the sum is 52.

The square root of 145999717 is about 12083.0342629656. The cubic root of 145999717 is about 526.5634025942.

The spelling of 145999717 in words is "one hundred forty-five million, nine hundred ninety-nine thousand, seven hundred seventeen".