145824913 has 4 divisors (see below), whose sum is σ = 157042228. Its totient is φ = 134607600.

The previous prime is 145824893. The next prime is 145824923. The reversal of 145824913 is 319428541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12837889 + 132987024 = 3583^2 + 11532^2 .

It is a cyclic number.

It is not a de Polignac number, because 145824913 - 2⁹ = 145824401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145824923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5608638 + ... + 5608663.

It is an arithmetic number, because the mean of its divisors is an integer number (39260557).

Almost surely, 2^145824913 is an apocalyptic number.

145824913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

145824913 is a deficient number, since it is larger than the sum of its proper divisors (11217315).

145824913 is a wasteful number, since it uses less digits than its factorization.

145824913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11217314.

The product of its digits is 34560, while the sum is 37.

The square root of 145824913 is about 12075.7986485367. The cubic root of 145824913 is about 526.3531689710.

The spelling of 145824913 in words is "one hundred forty-five million, eight hundred twenty-four thousand, nine hundred thirteen".