149685469 has 2 divisors, whose sum is σ = 149685470. Its totient is φ = 149685468.

The previous prime is 149685467. The next prime is 149685509. The reversal of 149685469 is 964586941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144889369 + 4796100 = 12037^2 + 2190^2 .

It is an emirp because it is prime and its reverse (964586941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149685469 - 2¹ = 149685467 is a prime.

It is a super-2 number, since 2×149685469² = 44811479259499922, which contains 22 as substring.

Together with 149685467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149685467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74842734 + 74842735.

It is an arithmetic number, because the mean of its divisors is an integer number (74842735).

Almost surely, 2^149685469 is an apocalyptic number.

It is an amenable number.

149685469 is a deficient number, since it is larger than the sum of its proper divisors (1).

149685469 is an equidigital number, since it uses as much as digits as its factorization.

149685469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 52.

The square root of 149685469 is about 12234.6013012276. The cubic root of 149685469 is about 530.9576479758.

The spelling of 149685469 in words is "one hundred forty-nine million, six hundred eighty-five thousand, four hundred sixty-nine".