149394689 has 4 divisors (see below), whose sum is σ = 154546260. Its totient is φ = 144243120.

The previous prime is 149394677. The next prime is 149394697. The reversal of 149394689 is 986493941.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986493941 = 433 ⋅2278277.

It can be written as a sum of positive squares in 2 ways, for example, as 121727089 + 27667600 = 11033^2 + 5260^2 .

It is a cyclic number.

It is not a de Polignac number, because 149394689 - 2⁸ = 149394433 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 149394689.

It is not an unprimeable number, because it can be changed into a prime (149394629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2575742 + ... + 2575799.

It is an arithmetic number, because the mean of its divisors is an integer number (38636565).

Almost surely, 2^149394689 is an apocalyptic number.

It is an amenable number.

149394689 is a deficient number, since it is larger than the sum of its proper divisors (5151571).

149394689 is an equidigital number, since it uses as much as digits as its factorization.

149394689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151570.

The product of its digits is 1679616, while the sum is 53.

The square root of 149394689 is about 12222.7120149335. The cubic root of 149394689 is about 530.6136111360.

The spelling of 149394689 in words is "one hundred forty-nine million, three hundred ninety-four thousand, six hundred eighty-nine".