148644869 has 2 divisors, whose sum is σ = 148644870. Its totient is φ = 148644868.

The previous prime is 148644857. The next prime is 148644877. The reversal of 148644869 is 968446841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141300769 + 7344100 = 11887^2 + 2710^2 .

It is a cyclic number.

It is not a de Polignac number, because 148644869 - 2²⁴ = 131867653 is a prime.

It is a super-2 number, since 2×148644869² = 44190594160054322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148644269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74322434 + 74322435.

It is an arithmetic number, because the mean of its divisors is an integer number (74322435).

Almost surely, 2^148644869 is an apocalyptic number.

It is an amenable number.

148644869 is a deficient number, since it is larger than the sum of its proper divisors (1).

148644869 is an equidigital number, since it uses as much as digits as its factorization.

148644869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 50.

The square root of 148644869 is about 12192.0002050525. Note that the first 3 decimals coincide. The cubic root of 148644869 is about 529.7243956902.

The spelling of 148644869 in words is "one hundred forty-eight million, six hundred forty-four thousand, eight hundred sixty-nine".