149561089 has 2 divisors, whose sum is σ = 149561090. Its totient is φ = 149561088.

The previous prime is 149561051. The next prime is 149561101. The reversal of 149561089 is 980165941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146894400 + 2666689 = 12120^2 + 1633^2 .

It is a cyclic number.

It is not a de Polignac number, because 149561089 - 2¹⁹ = 149036801 is a prime.

It is not a weakly prime, because it can be changed into another prime (149561039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74780544 + 74780545.

It is an arithmetic number, because the mean of its divisors is an integer number (74780545).

Almost surely, 2^149561089 is an apocalyptic number.

It is an amenable number.

149561089 is a deficient number, since it is larger than the sum of its proper divisors (1).

149561089 is an equidigital number, since it uses as much as digits as its factorization.

149561089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 149561089 is about 12229.5171204754. The cubic root of 149561089 is about 530.8105421521.

The spelling of 149561089 in words is "one hundred forty-nine million, five hundred sixty-one thousand, eighty-nine".