149841493 has 2 divisors, whose sum is σ = 149841494. Its totient is φ = 149841492.

The previous prime is 149841491. The next prime is 149841563. The reversal of 149841493 is 394148941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78978769 + 70862724 = 8887^2 + 8418^2 .

It is an emirp because it is prime and its reverse (394148941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149841493 - 2¹ = 149841491 is a prime.

Together with 149841491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149841491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74920746 + 74920747.

It is an arithmetic number, because the mean of its divisors is an integer number (74920747).

Almost surely, 2^149841493 is an apocalyptic number.

It is an amenable number.

149841493 is a deficient number, since it is larger than the sum of its proper divisors (1).

149841493 is an equidigital number, since it uses as much as digits as its factorization.

149841493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 149841493 is about 12240.9759823308. The cubic root of 149841493 is about 531.1420643833.

The spelling of 149841493 in words is "one hundred forty-nine million, eight hundred forty-one thousand, four hundred ninety-three".