149471791 has 8 divisors (see below), whose sum is σ = 171770144. Its totient is φ = 127409760.

The previous prime is 149471783. The next prime is 149471813. The reversal of 149471791 is 197174941.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149471791 - 2³ = 149471783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149471711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57720 + ... + 60253.

It is an arithmetic number, because the mean of its divisors is an integer number (21471268).

Almost surely, 2^149471791 is an apocalyptic number.

149471791 is a deficient number, since it is larger than the sum of its proper divisors (22298353).

149471791 is a wasteful number, since it uses less digits than its factorization.

149471791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118161.

The product of its digits is 63504, while the sum is 43.

The square root of 149471791 is about 12225.8656544230. The cubic root of 149471791 is about 530.7048779561.

The spelling of 149471791 in words is "one hundred forty-nine million, four hundred seventy-one thousand, seven hundred ninety-one".