149806693 has 4 divisors (see below), whose sum is σ = 149952748. Its totient is φ = 149660640.

The previous prime is 149806691. The next prime is 149806739. The reversal of 149806693 is 396608941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89075844 + 60730849 = 9438^2 + 7793^2 .

It is a cyclic number.

It is not a de Polignac number, because 149806693 - 2¹ = 149806691 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149806691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71478 + ... + 73543.

It is an arithmetic number, because the mean of its divisors is an integer number (37488187).

Almost surely, 2^149806693 is an apocalyptic number.

It is an amenable number.

149806693 is a deficient number, since it is larger than the sum of its proper divisors (146055).

149806693 is a wasteful number, since it uses less digits than its factorization.

149806693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146054.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 149806693 is about 12239.5544445049. The cubic root of 149806693 is about 531.1009427630.

The spelling of 149806693 in words is "one hundred forty-nine million, eight hundred six thousand, six hundred ninety-three".