148891669 has 2 divisors, whose sum is σ = 148891670. Its totient is φ = 148891668.

The previous prime is 148891649. The next prime is 148891693. The reversal of 148891669 is 966198841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131377444 + 17514225 = 11462^2 + 4185^2 .

It is an emirp because it is prime and its reverse (966198841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148891669 - 2⁹ = 148891157 is a prime.

It is a super-2 number, since 2×148891669² = 44337458195211122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148891649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74445834 + 74445835.

It is an arithmetic number, because the mean of its divisors is an integer number (74445835).

Almost surely, 2^148891669 is an apocalyptic number.

It is an amenable number.

148891669 is a deficient number, since it is larger than the sum of its proper divisors (1).

148891669 is an equidigital number, since it uses as much as digits as its factorization.

148891669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 52.

The square root of 148891669 is about 12202.1173982223. The cubic root of 148891669 is about 530.0174065720.

The spelling of 148891669 in words is "one hundred forty-eight million, eight hundred ninety-one thousand, six hundred sixty-nine".