149781489 has 48 divisors (see below), whose sum is σ = 239065344. Its totient is φ = 82680000.

The previous prime is 149781479. The next prime is 149781493. The reversal of 149781489 is 984187941.

It is not a de Polignac number, because 149781489 - 2¹² = 149777393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (149781409) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 596614 + ... + 596864.

It is an arithmetic number, because the mean of its divisors is an integer number (4980528).

Almost surely, 2^149781489 is an apocalyptic number.

It is an amenable number.

149781489 is a deficient number, since it is larger than the sum of its proper divisors (89283855).

149781489 is a wasteful number, since it uses less digits than its factorization.

149781489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 385 counting only the distinct ones).

The product of its digits is 580608, while the sum is 51.

The square root of 149781489 is about 12238.5247885519. The cubic root of 149781489 is about 531.0711563348.

The spelling of 149781489 in words is "one hundred forty-nine million, seven hundred eighty-one thousand, four hundred eighty-nine".