145143397 has 4 divisors (see below), whose sum is σ = 165878176. Its totient is φ = 124408620.

The previous prime is 145143391. The next prime is 145143431. The reversal of 145143397 is 793341541.

145143397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 793341541 = 283 ⋅2803327.

It is not a de Polignac number, because 145143397 - 2⁷ = 145143269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145143391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10367379 + ... + 10367392.

It is an arithmetic number, because the mean of its divisors is an integer number (41469544).

Almost surely, 2^145143397 is an apocalyptic number.

It is an amenable number.

145143397 is a deficient number, since it is larger than the sum of its proper divisors (20734779).

145143397 is an equidigital number, since it uses as much as digits as its factorization.

145143397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20734778.

The product of its digits is 45360, while the sum is 37.

The square root of 145143397 is about 12047.5473437542. The cubic root of 145143397 is about 525.5319138094.

The spelling of 145143397 in words is "one hundred forty-five million, one hundred forty-three thousand, three hundred ninety-seven".