149899213 has 2 divisors, whose sum is σ = 149899214. Its totient is φ = 149899212.

The previous prime is 149899193. The next prime is 149899219. The reversal of 149899213 is 312998941.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147816964 + 2082249 = 12158^2 + 1443^2 .

It is a cyclic number.

It is not a de Polignac number, because 149899213 - 2⁵ = 149899181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149899219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74949606 + 74949607.

It is an arithmetic number, because the mean of its divisors is an integer number (74949607).

Almost surely, 2^149899213 is an apocalyptic number.

It is an amenable number.

149899213 is a deficient number, since it is larger than the sum of its proper divisors (1).

149899213 is an equidigital number, since it uses as much as digits as its factorization.

149899213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 46.

The square root of 149899213 is about 12243.3334104728. Note that the first 3 decimals coincide. The cubic root of 149899213 is about 531.2102555180.

The spelling of 149899213 in words is "one hundred forty-nine million, eight hundred ninety-nine thousand, two hundred thirteen".