145638313 has 2 divisors, whose sum is σ = 145638314. Its totient is φ = 145638312.

The previous prime is 145638299. The next prime is 145638347. The reversal of 145638313 is 313836541.

It is an a-pointer prime, because the next prime (145638347) can be obtained adding 145638313 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89643024 + 55995289 = 9468^2 + 7483^2 .

It is a cyclic number.

It is not a de Polignac number, because 145638313 - 2²¹ = 143541161 is a prime.

It is equal to p_8212498 and since 145638313 and 8212498 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (145635313) 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 as a sum of consecutive naturals, namely, 72819156 + 72819157.

It is an arithmetic number, because the mean of its divisors is an integer number (72819157).

Almost surely, 2^145638313 is an apocalyptic number.

It is an amenable number.

145638313 is a deficient number, since it is larger than the sum of its proper divisors (1).

145638313 is an equidigital number, since it uses as much as digits as its factorization.

145638313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 34.

The square root of 145638313 is about 12068.0699782525. The cubic root of 145638313 is about 526.1285630316.

The spelling of 145638313 in words is "one hundred forty-five million, six hundred thirty-eight thousand, three hundred thirteen".