145369817 has 4 divisors (see below), whose sum is σ = 153020880. Its totient is φ = 137718756.

The previous prime is 145369813. The next prime is 145369853. The reversal of 145369817 is 718963541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 718963541 = 17 ⋅42291973.

It is a cyclic number.

It is not a de Polignac number, because 145369817 - 2² = 145369813 is a prime.

It is a super-2 number, since 2×145369817² = 42264767389226978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a 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 in 3 ways as a sum of consecutive naturals, for example, 3825503 + ... + 3825540.

It is an arithmetic number, because the mean of its divisors is an integer number (38255220).

Almost surely, 2^145369817 is an apocalyptic number.

It is an amenable number.

145369817 is a deficient number, since it is larger than the sum of its proper divisors (7651063).

145369817 is an equidigital number, since it uses as much as digits as its factorization.

145369817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651062.

The product of its digits is 181440, while the sum is 44.

The square root of 145369817 is about 12056.9406152639. The cubic root of 145369817 is about 525.8050439636.

It can be divided in two parts, 1453 and 69817, that multiplied together give a palindrome (101444101).

The spelling of 145369817 in words is "one hundred forty-five million, three hundred sixty-nine thousand, eight hundred seventeen".