149695573 has 2 divisors, whose sum is σ = 149695574. Its totient is φ = 149695572.

The previous prime is 149695571. The next prime is 149695583. The reversal of 149695573 is 375596941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149646289 + 49284 = 12233^2 + 222^2 .

It is a cyclic number.

It is not a de Polignac number, because 149695573 - 2¹ = 149695571 is a prime.

Together with 149695571, 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 (149695571) 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, 74847786 + 74847787.

It is an arithmetic number, because the mean of its divisors is an integer number (74847787).

Almost surely, 2^149695573 is an apocalyptic number.

It is an amenable number.

149695573 is a deficient number, since it is larger than the sum of its proper divisors (1).

149695573 is an equidigital number, since it uses as much as digits as its factorization.

149695573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 49.

The square root of 149695573 is about 12235.0142214874. The cubic root of 149695573 is about 530.9695945270.

The spelling of 149695573 in words is "one hundred forty-nine million, six hundred ninety-five thousand, five hundred seventy-three".