145117393 has 2 divisors, whose sum is σ = 145117394. Its totient is φ = 145117392.

The previous prime is 145117381. The next prime is 145117447. The reversal of 145117393 is 393711541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139996224 + 5121169 = 11832^2 + 2263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145117393 is a prime.

It is a super-2 number, since 2×145117393² = 42118115502232898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145114393) 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 as a sum of consecutive naturals, namely, 72558696 + 72558697.

It is an arithmetic number, because the mean of its divisors is an integer number (72558697).

Almost surely, 2^145117393 is an apocalyptic number.

It is an amenable number.

145117393 is a deficient number, since it is larger than the sum of its proper divisors (1).

145117393 is an equidigital number, since it uses as much as digits as its factorization.

145117393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 145117393 is about 12046.4680715968. The cubic root of 145117393 is about 525.5005270374.

It can be divided in two parts, 14511 and 7393, that added together give a square (21904 = 148²).

The spelling of 145117393 in words is "one hundred forty-five million, one hundred seventeen thousand, three hundred ninety-three".