149689605 has 32 divisors (see below), whose sum is σ = 264910464. Its totient is φ = 71698176.

The previous prime is 149689597. The next prime is 149689613. The reversal of 149689605 is 506986941.

It is an interprime number because it is at equal distance from previous prime (149689597) and next prime (149689613).

It is not a de Polignac number, because 149689605 - 2³ = 149689597 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3159 + ... + 17588.

It is an arithmetic number, because the mean of its divisors is an integer number (8278452).

Almost surely, 2^149689605 is an apocalyptic number.

149689605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

149689605 is a deficient number, since it is larger than the sum of its proper divisors (115220859).

149689605 is a wasteful number, since it uses less digits than its factorization.

149689605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20805.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 149689605 is about 12234.7703288619. The cubic root of 149689605 is about 530.9625382759.

The spelling of 149689605 in words is "one hundred forty-nine million, six hundred eighty-nine thousand, six hundred five".