149097609 has 12 divisors (see below), whose sum is σ = 218314356. Its totient is φ = 98036352.

The previous prime is 149097589. The next prime is 149097623. The reversal of 149097609 is 906790941.

It can be written as a sum of positive squares in 2 ways, for example, as 126630009 + 22467600 = 11253^2 + 4740^2 .

It is not a de Polignac number, because 149097609 - 2⁸ = 149097353 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (149097629) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 112812 + ... + 114125.

It is an arithmetic number, because the mean of its divisors is an integer number (18192863).

Almost surely, 2^149097609 is an apocalyptic number.

It is an amenable number.

149097609 is a deficient number, since it is larger than the sum of its proper divisors (69216747).

149097609 is a wasteful number, since it uses less digits than its factorization.

149097609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227016 (or 227013 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 149097609 is about 12210.5531815721. The cubic root of 149097609 is about 530.2616590981.

It can be divided in two parts, 1490 and 97609, that added together give a palindrome (99099).

The spelling of 149097609 in words is "one hundred forty-nine million, ninety-seven thousand, six hundred nine".