149697089 has 4 divisors (see below), whose sum is σ = 151021956. Its totient is φ = 148372224.

The previous prime is 149696993. The next prime is 149697091. The reversal of 149697089 is 980796941.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 980796941 = 31 ⋅31638611.

It can be written as a sum of positive squares in 2 ways, for example, as 46471489 + 103225600 = 6817^2 + 10160^2 .

It is a cyclic number.

It is not a de Polignac number, because 149697089 - 2¹⁶ = 149631553 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 149697089.

It is not an unprimeable number, because it can be changed into a prime (149697589) 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 3 ways as a sum of consecutive naturals, for example, 662264 + ... + 662489.

It is an arithmetic number, because the mean of its divisors is an integer number (37755489).

Almost surely, 2^149697089 is an apocalyptic number.

It is an amenable number.

149697089 is a deficient number, since it is larger than the sum of its proper divisors (1324867).

149697089 is a wasteful number, since it uses less digits than its factorization.

149697089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324866.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 149697089 is about 12235.0761746709. The cubic root of 149697089 is about 530.9713869363.

The spelling of 149697089 in words is "one hundred forty-nine million, six hundred ninety-seven thousand, eighty-nine".