148723661 has 2 divisors, whose sum is σ = 148723662. Its totient is φ = 148723660.

The previous prime is 148723643. The next prime is 148723669. The reversal of 148723661 is 166327841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147161161 + 1562500 = 12131^2 + 1250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-148723661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148723669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74361830 + 74361831.

It is an arithmetic number, because the mean of its divisors is an integer number (74361831).

Almost surely, 2^148723661 is an apocalyptic number.

It is an amenable number.

148723661 is a deficient number, since it is larger than the sum of its proper divisors (1).

148723661 is an equidigital number, since it uses as much as digits as its factorization.

148723661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 148723661 is about 12195.2310761215. The cubic root of 148723661 is about 529.8179759404.

The spelling of 148723661 in words is "one hundred forty-eight million, seven hundred twenty-three thousand, six hundred sixty-one".