61020089 has 16 divisors (see below), whose sum is σ = 71986320. Its totient is φ = 51179520.

The previous prime is 61020083. The next prime is 61020143. The reversal of 61020089 is 98002016.

It can be written as a sum of positive squares in 8 ways, for example, as 258064 + 60762025 = 508^2 + 7795^2 .

It is not a de Polignac number, because 61020089 - 2⁴ = 61020073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61020083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1649 + ... + 11169.

It is an arithmetic number, because the mean of its divisors is an integer number (4499145).

Almost surely, 2^61020089 is an apocalyptic number.

It is an amenable number.

61020089 is a deficient number, since it is larger than the sum of its proper divisors (10966231).

61020089 is a wasteful number, since it uses less digits than its factorization.

61020089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9580.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 61020089 is about 7811.5356364802. The cubic root of 61020089 is about 393.6929268416.

The spelling of 61020089 in words is "sixty-one million, twenty thousand, eighty-nine".