149897893 has 2 divisors, whose sum is σ = 149897894. Its totient is φ = 149897892.

The previous prime is 149897887. The next prime is 149897977. The reversal of 149897893 is 398798941.

It is a happy number.

149897893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149866564 + 31329 = 12242^2 + 177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149897893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149897843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74948946 + 74948947.

It is an arithmetic number, because the mean of its divisors is an integer number (74948947).

Almost surely, 2^149897893 is an apocalyptic number.

It is an amenable number.

149897893 is a deficient number, since it is larger than the sum of its proper divisors (1).

149897893 is an equidigital number, since it uses as much as digits as its factorization.

149897893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 58.

The square root of 149897893 is about 12243.2795034664. The cubic root of 149897893 is about 531.2086962490.

The spelling of 149897893 in words is "one hundred forty-nine million, eight hundred ninety-seven thousand, eight hundred ninety-three".