149898149 has 2 divisors, whose sum is σ = 149898150. Its totient is φ = 149898148.

The previous prime is 149898079. The next prime is 149898193. The reversal of 149898149 is 941898941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120846049 + 29052100 = 10993^2 + 5390^2 .

It is a cyclic number.

It is not a de Polignac number, because 149898149 - 2⁸ = 149897893 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 149898149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149895149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74949074 + 74949075.

It is an arithmetic number, because the mean of its divisors is an integer number (74949075).

Almost surely, 2^149898149 is an apocalyptic number.

It is an amenable number.

149898149 is a deficient number, since it is larger than the sum of its proper divisors (1).

149898149 is an equidigital number, since it uses as much as digits as its factorization.

149898149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 53.

The square root of 149898149 is about 12243.2899581771. The cubic root of 149898149 is about 531.2089986534.

The spelling of 149898149 in words is "one hundred forty-nine million, eight hundred ninety-eight thousand, one hundred forty-nine".