145664893 has 16 divisors (see below), whose sum is σ = 163766016. Its totient is φ = 128399040.

The previous prime is 145664867. The next prime is 145664899. The reversal of 145664893 is 398466541.

It is not a de Polignac number, because 145664893 - 2¹³ = 145656701 is a prime.

It is a super-2 number, since 2×145664893² = 42436522105402898, 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 (145664899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188055 + ... + 188827.

It is an arithmetic number, because the mean of its divisors is an integer number (10235376).

Almost surely, 2^145664893 is an apocalyptic number.

It is an amenable number.

145664893 is a deficient number, since it is larger than the sum of its proper divisors (18101123).

145664893 is a wasteful number, since it uses less digits than its factorization.

145664893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284.

The product of its digits is 622080, while the sum is 46.

The square root of 145664893 is about 12069.1711811541. The cubic root of 145664893 is about 526.1605684525.

The spelling of 145664893 in words is "one hundred forty-five million, six hundred sixty-four thousand, eight hundred ninety-three".