145720193 has 2 divisors, whose sum is σ = 145720194. Its totient is φ = 145720192.

The previous prime is 145720151. The next prime is 145720199. The reversal of 145720193 is 391027541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102252544 + 43467649 = 10112^2 + 6593^2 .

It is a cyclic number.

It is not a de Polignac number, because 145720193 - 2²⁶ = 78611329 is a prime.

It is not a weakly prime, because it can be changed into another prime (145720199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72860096 + 72860097.

It is an arithmetic number, because the mean of its divisors is an integer number (72860097).

Almost surely, 2^145720193 is an apocalyptic number.

It is an amenable number.

145720193 is a deficient number, since it is larger than the sum of its proper divisors (1).

145720193 is an equidigital number, since it uses as much as digits as its factorization.

145720193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 145720193 is about 12071.4619247215. The cubic root of 145720193 is about 526.2271436296.

The spelling of 145720193 in words is "one hundred forty-five million, seven hundred twenty thousand, one hundred ninety-three".