148719869 has 2 divisors, whose sum is σ = 148719870. Its totient is φ = 148719868.

The previous prime is 148719847. The next prime is 148719899. The reversal of 148719869 is 968917841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130759225 + 17960644 = 11435^2 + 4238^2 .

It is a cyclic number.

It is not a de Polignac number, because 148719869 - 2²⁴ = 131942653 is a prime.

It is a super-4 number, since 4×148719869⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 148719869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148719899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74359934 + 74359935.

It is an arithmetic number, because the mean of its divisors is an integer number (74359935).

Almost surely, 2^148719869 is an apocalyptic number.

It is an amenable number.

148719869 is a deficient number, since it is larger than the sum of its proper divisors (1).

148719869 is an equidigital number, since it uses as much as digits as its factorization.

148719869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 53.

The square root of 148719869 is about 12195.0756045217. The cubic root of 148719869 is about 529.8134729876.

The spelling of 148719869 in words is "one hundred forty-eight million, seven hundred nineteen thousand, eight hundred sixty-nine".