145649647 has 16 divisors (see below), whose sum is σ = 171777312. Its totient is φ = 121749120.

The previous prime is 145649633. The next prime is 145649653. The reversal of 145649647 is 746946541.

It is a cyclic number.

It is not a de Polignac number, because 145649647 - 2¹⁵ = 145616879 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145649597 and 145649606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145649627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37773 + ... + 41449.

It is an arithmetic number, because the mean of its divisors is an integer number (10736082).

Almost surely, 2^145649647 is an apocalyptic number.

145649647 is a deficient number, since it is larger than the sum of its proper divisors (26127665).

145649647 is a wasteful number, since it uses less digits than its factorization.

145649647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978.

The product of its digits is 725760, while the sum is 46.

The square root of 145649647 is about 12068.5395553895. The cubic root of 145649647 is about 526.1422109660.

The spelling of 145649647 in words is "one hundred forty-five million, six hundred forty-nine thousand, six hundred forty-seven".