145732817 has 2 divisors, whose sum is σ = 145732818. Its totient is φ = 145732816.

The previous prime is 145732813. The next prime is 145732837. The reversal of 145732817 is 718237541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145540096 + 192721 = 12064^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 145732817 - 2² = 145732813 is a prime.

It is not a weakly prime, because it can be changed into another prime (145732813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72866408 + 72866409.

It is an arithmetic number, because the mean of its divisors is an integer number (72866409).

Almost surely, 2^145732817 is an apocalyptic number.

It is an amenable number.

145732817 is a deficient number, since it is larger than the sum of its proper divisors (1).

145732817 is an equidigital number, since it uses as much as digits as its factorization.

145732817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 145732817 is about 12071.9847995265. The cubic root of 145732817 is about 526.2423391892.

The spelling of 145732817 in words is "one hundred forty-five million, seven hundred thirty-two thousand, eight hundred seventeen".