145369813 has 2 divisors, whose sum is σ = 145369814. Its totient is φ = 145369812.

The previous prime is 145369811. The next prime is 145369853. The reversal of 145369813 is 318963541.

It is an a-pointer prime, because the next prime (145369853) can be obtained adding 145369813 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73153809 + 72216004 = 8553^2 + 8498^2 .

It is a cyclic number.

It is not a de Polignac number, because 145369813 - 2¹ = 145369811 is a prime.

It is a super-2 number, since 2×145369813² = 42264765063309938, which contains 22 as substring.

Together with 145369811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145369811) 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, 72684906 + 72684907.

It is an arithmetic number, because the mean of its divisors is an integer number (72684907).

Almost surely, 2^145369813 is an apocalyptic number.

It is an amenable number.

145369813 is a deficient number, since it is larger than the sum of its proper divisors (1).

145369813 is an equidigital number, since it uses as much as digits as its factorization.

145369813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 145369813 is about 12056.9404493843. The cubic root of 145369813 is about 525.8050391409.

The spelling of 145369813 in words is "one hundred forty-five million, three hundred sixty-nine thousand, eight hundred thirteen".