61123089 has 4 divisors (see below), whose sum is σ = 81497456. Its totient is φ = 40748724.

The previous prime is 61123067. The next prime is 61123099. The reversal of 61123089 is 98032116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61123089 - 2¹¹ = 61121041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61123099) 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, 10187179 + ... + 10187184.

It is an arithmetic number, because the mean of its divisors is an integer number (20374364).

Almost surely, 2^61123089 is an apocalyptic number.

It is an amenable number.

61123089 is a deficient number, since it is larger than the sum of its proper divisors (20374367).

61123089 is a wasteful number, since it uses less digits than its factorization.

61123089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20374366.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 61123089 is about 7818.1256705172. The cubic root of 61123089 is about 393.9143161009.

The spelling of 61123089 in words is "sixty-one million, one hundred twenty-three thousand, eighty-nine".