145290073 has 2 divisors, whose sum is σ = 145290074. Its totient is φ = 145290072.

The previous prime is 145290059. The next prime is 145290121. The reversal of 145290073 is 370092541.

145290073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102151449 + 43138624 = 10107^2 + 6568^2 .

It is a cyclic number.

It is not a de Polignac number, because 145290073 - 2²⁵ = 111735641 is a prime.

It is a super-2 number, since 2×145290073² = 42218410624690658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145290023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72645036 + 72645037.

It is an arithmetic number, because the mean of its divisors is an integer number (72645037).

Almost surely, 2^145290073 is an apocalyptic number.

It is an amenable number.

145290073 is a deficient number, since it is larger than the sum of its proper divisors (1).

145290073 is an equidigital number, since it uses as much as digits as its factorization.

145290073 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 31.

The square root of 145290073 is about 12053.6331867201. The cubic root of 145290073 is about 525.7088812534.

The spelling of 145290073 in words is "one hundred forty-five million, two hundred ninety thousand, seventy-three".