145457717 has 2 divisors, whose sum is σ = 145457718. Its totient is φ = 145457716.

The previous prime is 145457713. The next prime is 145457743. The reversal of 145457717 is 717754541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94206436 + 51251281 = 9706^2 + 7159^2 .

It is a cyclic number.

It is not a de Polignac number, because 145457717 - 2² = 145457713 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145457713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72728858 + 72728859.

It is an arithmetic number, because the mean of its divisors is an integer number (72728859).

Almost surely, 2^145457717 is an apocalyptic number.

It is an amenable number.

145457717 is a deficient number, since it is larger than the sum of its proper divisors (1).

145457717 is an equidigital number, since it uses as much as digits as its factorization.

145457717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137200, while the sum is 41.

The square root of 145457717 is about 12060.5852677223. The cubic root of 145457717 is about 525.9110011972.

The spelling of 145457717 in words is "one hundred forty-five million, four hundred fifty-seven thousand, seven hundred seventeen".