145857193 has 2 divisors, whose sum is σ = 145857194. Its totient is φ = 145857192.

The previous prime is 145857181. The next prime is 145857223. The reversal of 145857193 is 391758541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112529664 + 33327529 = 10608^2 + 5773^2 .

It is a cyclic number.

It is not a de Polignac number, because 145857193 - 2¹⁷ = 145726121 is a prime.

It is not a weakly prime, because it can be changed into another prime (145857493) 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 as a sum of consecutive naturals, namely, 72928596 + 72928597.

It is an arithmetic number, because the mean of its divisors is an integer number (72928597).

Almost surely, 2^145857193 is an apocalyptic number.

It is an amenable number.

145857193 is a deficient number, since it is larger than the sum of its proper divisors (1).

145857193 is an equidigital number, since it uses as much as digits as its factorization.

145857193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 145857193 is about 12077.1351321412. The cubic root of 145857193 is about 526.3920041888.

The spelling of 145857193 in words is "one hundred forty-five million, eight hundred fifty-seven thousand, one hundred ninety-three".