149839849 has 2 divisors, whose sum is σ = 149839850. Its totient is φ = 149839848.

The previous prime is 149839841. The next prime is 149839927. The reversal of 149839849 is 948938941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91546624 + 58293225 = 9568^2 + 7635^2 .

It is an emirp because it is prime and its reverse (948938941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149839849 - 2³ = 149839841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149839849.

It is not a weakly prime, because it can be changed into another prime (149839841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74919924 + 74919925.

It is an arithmetic number, because the mean of its divisors is an integer number (74919925).

Almost surely, 2^149839849 is an apocalyptic number.

It is an amenable number.

149839849 is a deficient number, since it is larger than the sum of its proper divisors (1).

149839849 is an equidigital number, since it uses as much as digits as its factorization.

149839849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 55.

The square root of 149839849 is about 12240.9088306384. The cubic root of 149839849 is about 531.1401218845.

The spelling of 149839849 in words is "one hundred forty-nine million, eight hundred thirty-nine thousand, eight hundred forty-nine".