145939717 has 8 divisors (see below), whose sum is σ = 181950912. Its totient is φ = 113719200.

The previous prime is 145939711. The next prime is 145939727. The reversal of 145939717 is 717939541.

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

It is not a de Polignac number, because 145939717 - 2³ = 145939709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145939711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947584 + ... + 947737.

It is an arithmetic number, because the mean of its divisors is an integer number (22743864).

Almost surely, 2^145939717 is an apocalyptic number.

It is an amenable number.

145939717 is a deficient number, since it is larger than the sum of its proper divisors (36011195).

145939717 is a wasteful number, since it uses less digits than its factorization.

145939717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895339.

The product of its digits is 238140, while the sum is 46.

The square root of 145939717 is about 12080.5511877563. The cubic root of 145939717 is about 526.4912605981.

It can be divided in two parts, 14593 and 9717, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 145939717 in words is "one hundred forty-five million, nine hundred thirty-nine thousand, seven hundred seventeen".