149205893 has 2 divisors, whose sum is σ = 149205894. Its totient is φ = 149205892.

The previous prime is 149205887. The next prime is 149205911. The reversal of 149205893 is 398502941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84676804 + 64529089 = 9202^2 + 8033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149205893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 149205893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149201893) 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, 74602946 + 74602947.

It is an arithmetic number, because the mean of its divisors is an integer number (74602947).

Almost surely, 2^149205893 is an apocalyptic number.

It is an amenable number.

149205893 is a deficient number, since it is larger than the sum of its proper divisors (1).

149205893 is an equidigital number, since it uses as much as digits as its factorization.

149205893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 149205893 is about 12214.9864101439. The cubic root of 149205893 is about 530.3899977506.

The spelling of 149205893 in words is "one hundred forty-nine million, two hundred five thousand, eight hundred ninety-three".