61278089 has 4 divisors (see below), whose sum is σ = 61332480. Its totient is φ = 61223700.

The previous prime is 61278037. The next prime is 61278109. The reversal of 61278089 is 98087216.

61278089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61278089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61278689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25469 + ... + 27770.

It is an arithmetic number, because the mean of its divisors is an integer number (15333120).

Almost surely, 2^61278089 is an apocalyptic number.

It is an amenable number.

61278089 is a deficient number, since it is larger than the sum of its proper divisors (54391).

61278089 is a wasteful number, since it uses less digits than its factorization.

61278089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54390.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 61278089 is about 7828.0322559376. The cubic root of 61278089 is about 394.2470064258.

The spelling of 61278089 in words is "sixty-one million, two hundred seventy-eight thousand, eighty-nine".