149039171 has 2 divisors, whose sum is σ = 149039172. Its totient is φ = 149039170.

The previous prime is 149039131. The next prime is 149039179. The reversal of 149039171 is 171930941.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 149039171 - 2²² = 144844867 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (149039179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74519585 + 74519586.

It is an arithmetic number, because the mean of its divisors is an integer number (74519586).

Almost surely, 2^149039171 is an apocalyptic number.

149039171 is a deficient number, since it is larger than the sum of its proper divisors (1).

149039171 is an equidigital number, since it uses as much as digits as its factorization.

149039171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 149039171 is about 12208.1600169723. The cubic root of 149039171 is about 530.1923723171.

The spelling of 149039171 in words is "one hundred forty-nine million, thirty-nine thousand, one hundred seventy-one".