61133889 has 8 divisors (see below), whose sum is σ = 81878272. Its totient is φ = 40572720.

The previous prime is 61133881. The next prime is 61133903. The reversal of 61133889 is 98833116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61133889 - 2³ = 61133881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61133881) 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 7 ways as a sum of consecutive naturals, for example, 45022 + ... + 46359.

It is an arithmetic number, because the mean of its divisors is an integer number (10234784).

Almost surely, 2^61133889 is an apocalyptic number.

It is an amenable number.

61133889 is a deficient number, since it is larger than the sum of its proper divisors (20744383).

61133889 is a wasteful number, since it uses less digits than its factorization.

61133889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91607.

The product of its digits is 31104, while the sum is 39.

The square root of 61133889 is about 7818.8163426442. The cubic root of 61133889 is about 393.9375153214.

The spelling of 61133889 in words is "sixty-one million, one hundred thirty-three thousand, eight hundred eighty-nine".