149587491 has 8 divisors (see below), whose sum is σ = 200885440. Its totient is φ = 99007272.

The previous prime is 149587441. The next prime is 149587499. The reversal of 149587491 is 194785941.

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

It is not a de Polignac number, because 149587491 - 2⁹ = 149586979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149587491.

It is not an unprimeable number, because it can be changed into a prime (149587499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178945 + ... + 179778.

It is an arithmetic number, because the mean of its divisors is an integer number (25110680).

Almost surely, 2^149587491 is an apocalyptic number.

149587491 is a deficient number, since it is larger than the sum of its proper divisors (51297949).

149587491 is a wasteful number, since it uses less digits than its factorization.

149587491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358865.

The product of its digits is 362880, while the sum is 48.

The square root of 149587491 is about 12230.5965103915. The cubic root of 149587491 is about 530.8417749534.

The spelling of 149587491 in words is "one hundred forty-nine million, five hundred eighty-seven thousand, four hundred ninety-one".