61163089 has 4 divisors (see below), whose sum is σ = 65867956. Its totient is φ = 56458224.

The previous prime is 61163083. The next prime is 61163111. The reversal of 61163089 is 98036116.

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 7756225 + 53406864 = 2785^2 + 7308^2 .

It is a cyclic number.

It is not a de Polignac number, because 61163089 - 2¹³ = 61154897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61163083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2352414 + ... + 2352439.

It is an arithmetic number, because the mean of its divisors is an integer number (16466989).

Almost surely, 2^61163089 is an apocalyptic number.

It is an amenable number.

61163089 is a deficient number, since it is larger than the sum of its proper divisors (4704867).

61163089 is a wasteful number, since it uses less digits than its factorization.

61163089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704866.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 61163089 is about 7820.6834100352. The cubic root of 61163089 is about 394.0002254630. Note that the first 3 decimals are identical.

The spelling of 61163089 in words is "sixty-one million, one hundred sixty-three thousand, eighty-nine".