149794891 has 2 divisors, whose sum is σ = 149794892. Its totient is φ = 149794890.

The previous prime is 149794867. The next prime is 149794919. The reversal of 149794891 is 198497941.

149794891 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 is an emirp because it is prime and its reverse (198497941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149794891 - 2⁵ = 149794859 is a prime.

It is not a weakly prime, because it can be changed into another prime (149794861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74897445 + 74897446.

It is an arithmetic number, because the mean of its divisors is an integer number (74897446).

Almost surely, 2^149794891 is an apocalyptic number.

149794891 is a deficient number, since it is larger than the sum of its proper divisors (1).

149794891 is an equidigital number, since it uses as much as digits as its factorization.

149794891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 149794891 is about 12239.0723096156. The cubic root of 149794891 is about 531.0869954157.

The spelling of 149794891 in words is "one hundred forty-nine million, seven hundred ninety-four thousand, eight hundred ninety-one".