145077917 has 2 divisors, whose sum is σ = 145077918. Its totient is φ = 145077916.

The previous prime is 145077913. The next prime is 145077943. The reversal of 145077917 is 719770541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143664196 + 1413721 = 11986^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 145077917 - 2² = 145077913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145077913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72538958 + 72538959.

It is an arithmetic number, because the mean of its divisors is an integer number (72538959).

Almost surely, 2^145077917 is an apocalyptic number.

It is an amenable number.

145077917 is a deficient number, since it is larger than the sum of its proper divisors (1).

145077917 is an equidigital number, since it uses as much as digits as its factorization.

145077917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 41.

The square root of 145077917 is about 12044.8294716032. The cubic root of 145077917 is about 525.4528724232.

The spelling of 145077917 in words is "one hundred forty-five million, seventy-seven thousand, nine hundred seventeen".