149769481 has 2 divisors, whose sum is σ = 149769482. Its totient is φ = 149769480.

The previous prime is 149769461. The next prime is 149769493. The reversal of 149769481 is 184967941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90725625 + 59043856 = 9525^2 + 7684^2 .

It is an emirp because it is prime and its reverse (184967941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149769481 - 2¹³ = 149761289 is a prime.

It is a super-3 number, since 3×149769481³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (149769421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74884740 + 74884741.

It is an arithmetic number, because the mean of its divisors is an integer number (74884741).

Almost surely, 2^149769481 is an apocalyptic number.

It is an amenable number.

149769481 is a deficient number, since it is larger than the sum of its proper divisors (1).

149769481 is an equidigital number, since it uses as much as digits as its factorization.

149769481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 149769481 is about 12238.0341967164. The cubic root of 149769481 is about 531.0569639427.

The spelling of 149769481 in words is "one hundred forty-nine million, seven hundred sixty-nine thousand, four hundred eighty-one".