149539689 has 80 divisors (see below), whose sum is σ = 256132800. Its totient is φ = 86292864.

The previous prime is 149539661. The next prime is 149539711. The reversal of 149539689 is 986935941.

149539689 = T₂₁₄ + T₂₁₅ + ... + T₉₆₇.

149539689 is a `hidden beast` number, since 1 + 49 + 539 + 68 + 9 = 666.

It is not a de Polignac number, because 149539689 - 2⁵ = 149539657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149539639) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1801642 + ... + 1801724.

It is an arithmetic number, because the mean of its divisors is an integer number (3201660).

Almost surely, 2^149539689 is an apocalyptic number.

It is an amenable number.

149539689 is a deficient number, since it is larger than the sum of its proper divisors (106593111).

149539689 is a wasteful number, since it uses less digits than its factorization.

149539689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 187 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 149539689 is about 12228.6421568382. The cubic root of 149539689 is about 530.7852238746.

It can be divided in two parts, 14953 and 9689, that added together give a palindrome (24642).

The spelling of 149539689 in words is "one hundred forty-nine million, five hundred thirty-nine thousand, six hundred eighty-nine".