148903649 has 2 divisors, whose sum is σ = 148903650. Its totient is φ = 148903648.

The previous prime is 148903637. The next prime is 148903673. The reversal of 148903649 is 946309841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74943649 + 73960000 = 8657^2 + 8600^2 .

It is an emirp because it is prime and its reverse (946309841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148903649 - 2²⁰ = 147855073 is a prime.

It is not a weakly prime, because it can be changed into another prime (148903619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74451824 + 74451825.

It is an arithmetic number, because the mean of its divisors is an integer number (74451825).

Almost surely, 2^148903649 is an apocalyptic number.

It is an amenable number.

148903649 is a deficient number, since it is larger than the sum of its proper divisors (1).

148903649 is an equidigital number, since it uses as much as digits as its factorization.

148903649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 148903649 is about 12202.6082867557. The cubic root of 148903649 is about 530.0316214668.

The spelling of 148903649 in words is "one hundred forty-eight million, nine hundred three thousand, six hundred forty-nine".