149385517 has 2 divisors, whose sum is σ = 149385518. Its totient is φ = 149385516.

The previous prime is 149385499. The next prime is 149385541. The reversal of 149385517 is 715583941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105904681 + 43480836 = 10291^2 + 6594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149385517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149389517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74692758 + 74692759.

It is an arithmetic number, because the mean of its divisors is an integer number (74692759).

Almost surely, 2^149385517 is an apocalyptic number.

It is an amenable number.

149385517 is a deficient number, since it is larger than the sum of its proper divisors (1).

149385517 is an equidigital number, since it uses as much as digits as its factorization.

149385517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 149385517 is about 12222.3368060285. The cubic root of 149385517 is about 530.6027520092.

The spelling of 149385517 in words is "one hundred forty-nine million, three hundred eighty-five thousand, five hundred seventeen".