61089867 has 24 divisors (see below), whose sum is σ = 90979200. Its totient is φ = 39481728.

The previous prime is 61089859. The next prime is 61089869. The reversal of 61089867 is 76898016.

It is a happy number.

It is not a de Polignac number, because 61089867 - 2³ = 61089859 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61089869) 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 23 ways as a sum of consecutive naturals, for example, 41734 + ... + 43172.

It is an arithmetic number, because the mean of its divisors is an integer number (3790800).

Almost surely, 2^61089867 is an apocalyptic number.

61089867 is a deficient number, since it is larger than the sum of its proper divisors (29889333).

61089867 is a wasteful number, since it uses less digits than its factorization.

61089867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587 (or 1584 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 61089867 is about 7816.0007036847. Note that the first 3 decimals coincide. The cubic root of 61089867 is about 393.8429355838.

The spelling of 61089867 in words is "sixty-one million, eighty-nine thousand, eight hundred sixty-seven".