145998647 has 8 divisors (see below), whose sum is σ = 146992320. Its totient is φ = 145008640.

The previous prime is 145998617. The next prime is 145998659. The reversal of 145998647 is 746899541.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145998647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145998617) 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, 152723 + ... + 153675.

It is an arithmetic number, because the mean of its divisors is an integer number (18374040).

Almost surely, 2^145998647 is an apocalyptic number.

145998647 is a deficient number, since it is larger than the sum of its proper divisors (993673).

145998647 is an equidigital number, since it uses as much as digits as its factorization.

145998647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833.

The product of its digits is 2177280, while the sum is 53.

The square root of 145998647 is about 12082.9899859265. The cubic root of 145998647 is about 526.5621162351.

The spelling of 145998647 in words is "one hundred forty-five million, nine hundred ninety-eight thousand, six hundred forty-seven".