149989571 has 2 divisors, whose sum is σ = 149989572. Its totient is φ = 149989570.

The previous prime is 149989531. The next prime is 149989573. The reversal of 149989571 is 175989941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149989571 - 2⁶ = 149989507 is a prime.

It is a Sophie Germain prime.

Together with 149989573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149989573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74994785 + 74994786.

It is an arithmetic number, because the mean of its divisors is an integer number (74994786).

Almost surely, 2^149989571 is an apocalyptic number.

149989571 is a deficient number, since it is larger than the sum of its proper divisors (1).

149989571 is an equidigital number, since it uses as much as digits as its factorization.

149989571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 53.

The square root of 149989571 is about 12247.0229443731. The cubic root of 149989571 is about 531.3169704546.

The spelling of 149989571 in words is "one hundred forty-nine million, nine hundred eighty-nine thousand, five hundred seventy-one".