145709693 has 2 divisors, whose sum is σ = 145709694. Its totient is φ = 145709692.

The previous prime is 145709687. The next prime is 145709731. The reversal of 145709693 is 396907541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137288089 + 8421604 = 11717^2 + 2902^2 .

It is a cyclic number.

It is not a de Polignac number, because 145709693 - 2⁴ = 145709677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145702693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72854846 + 72854847.

It is an arithmetic number, because the mean of its divisors is an integer number (72854847).

Almost surely, 2^145709693 is an apocalyptic number.

It is an amenable number.

145709693 is a deficient number, since it is larger than the sum of its proper divisors (1).

145709693 is an equidigital number, since it uses as much as digits as its factorization.

145709693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 145709693 is about 12071.0270068458. The cubic root of 145709693 is about 526.2145040688.

The spelling of 145709693 in words is "one hundred forty-five million, seven hundred nine thousand, six hundred ninety-three".