149884517 has 2 divisors, whose sum is σ = 149884518. Its totient is φ = 149884516.

The previous prime is 149884513. The next prime is 149884519. The reversal of 149884517 is 715488941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149842081 + 42436 = 12241^2 + 206^2 .

It is an emirp because it is prime and its reverse (715488941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149884517 - 2² = 149884513 is a prime.

Together with 149884519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149884513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74942258 + 74942259.

It is an arithmetic number, because the mean of its divisors is an integer number (74942259).

Almost surely, 2^149884517 is an apocalyptic number.

It is an amenable number.

149884517 is a deficient number, since it is larger than the sum of its proper divisors (1).

149884517 is an equidigital number, since it uses as much as digits as its factorization.

149884517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 47.

The square root of 149884517 is about 12242.7332324118. The cubic root of 149884517 is about 531.1928951399.

The spelling of 149884517 in words is "one hundred forty-nine million, eight hundred eighty-four thousand, five hundred seventeen".