149654191 has 2 divisors, whose sum is σ = 149654192. Its totient is φ = 149654190.

The previous prime is 149654177. The next prime is 149654201. The reversal of 149654191 is 191456941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149654191 - 2¹⁷ = 149523119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149654291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74827095 + 74827096.

It is an arithmetic number, because the mean of its divisors is an integer number (74827096).

Almost surely, 2^149654191 is an apocalyptic number.

149654191 is a deficient number, since it is larger than the sum of its proper divisors (1).

149654191 is an equidigital number, since it uses as much as digits as its factorization.

149654191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 149654191 is about 12233.3229745642. The cubic root of 149654191 is about 530.9206627554.

The spelling of 149654191 in words is "one hundred forty-nine million, six hundred fifty-four thousand, one hundred ninety-one".