145317943 has 2 divisors, whose sum is σ = 145317944. Its totient is φ = 145317942.

The previous prime is 145317919. The next prime is 145317971. The reversal of 145317943 is 349713541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145317943 - 2⁵ = 145317911 is a prime.

It is a super-2 number, since 2×145317943² = 42234609115502498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145317143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72658971 + 72658972.

It is an arithmetic number, because the mean of its divisors is an integer number (72658972).

Almost surely, 2^145317943 is an apocalyptic number.

145317943 is a deficient number, since it is larger than the sum of its proper divisors (1).

145317943 is an equidigital number, since it uses as much as digits as its factorization.

145317943 is an evil number, because the sum of its binary digits is even.

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

The square root of 145317943 is about 12054.7892142501. The cubic root of 145317943 is about 525.7424934828.

The spelling of 145317943 in words is "one hundred forty-five million, three hundred seventeen thousand, nine hundred forty-three".