145758817 has 2 divisors, whose sum is σ = 145758818. Its totient is φ = 145758816.

The previous prime is 145758793. The next prime is 145758827. The reversal of 145758817 is 718857541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100721296 + 45037521 = 10036^2 + 6711^2 .

It is an emirp because it is prime and its reverse (718857541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145758817 - 2¹¹ = 145756769 is a prime.

It is not a weakly prime, because it can be changed into another prime (145758827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72879408 + 72879409.

It is an arithmetic number, because the mean of its divisors is an integer number (72879409).

Almost surely, 2^145758817 is an apocalyptic number.

It is an amenable number.

145758817 is a deficient number, since it is larger than the sum of its proper divisors (1).

145758817 is an equidigital number, since it uses as much as digits as its factorization.

145758817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 313600, while the sum is 46.

The square root of 145758817 is about 12073.0616249566. The cubic root of 145758817 is about 526.2736327292.

The spelling of 145758817 in words is "one hundred forty-five million, seven hundred fifty-eight thousand, eight hundred seventeen".