145313399 has 32 divisors (see below), whose sum is σ = 198070272. Its totient is φ = 103104000.

The previous prime is 145313353. The next prime is 145313417. The reversal of 145313399 is 993313541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145313399 is a prime.

It is a super-2 number, since 2×145313399² = 42231967857866402, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145313309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38789 + ... + 42369.

It is an arithmetic number, because the mean of its divisors is an integer number (6189696).

Almost surely, 2^145313399 is an apocalyptic number.

145313399 is a deficient number, since it is larger than the sum of its proper divisors (52756873).

145313399 is a wasteful number, since it uses less digits than its factorization.

145313399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3647.

The product of its digits is 43740, while the sum is 38.

The square root of 145313399 is about 12054.6007399665. The cubic root of 145313399 is about 525.7370135474.

The spelling of 145313399 in words is "one hundred forty-five million, three hundred thirteen thousand, three hundred ninety-nine".