148948911721 has 3 divisors (see below), whose sum is σ = 148949297661. Its totient is φ = 148948525782.

The previous prime is 148948911689. The next prime is 148948911739. The reversal of 148948911721 is 127119849841.

It is a happy number.

The square root of 148948911721 is 385939.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 127119849841 = 10111 ⋅12572431.

It is not a de Polignac number, because 148948911721 - 2⁵ = 148948911689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148948981721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 192970 + ... + 578908.

It is an arithmetic number, because the mean of its divisors is an integer number (49649765887).

Almost surely, 2^148948911721 is an apocalyptic number.

148948911721 is the 385939-th square number.

148948911721 is the 192970-th centered octagonal number.

It is an amenable number.

148948911721 is a deficient number, since it is larger than the sum of its proper divisors (385940).

148948911721 is an frugal number, since it uses more digits than its factorization.

148948911721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771878 (or 385939 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 55.

The spelling of 148948911721 in words is "one hundred forty-eight billion, nine hundred forty-eight million, nine hundred eleven thousand, seven hundred twenty-one".