89780061 has 16 divisors (see below), whose sum is σ = 141221888. Its totient is φ = 49647600.

The previous prime is 89780057. The next prime is 89780069. The reversal of 89780061 is 16008798.

It is not a de Polignac number, because 89780061 - 2² = 89780057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89780069) 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, 68305 + ... + 69606.

It is an arithmetic number, because the mean of its divisors is an integer number (8826368).

Almost surely, 2^89780061 is an apocalyptic number.

It is an amenable number.

89780061 is a deficient number, since it is larger than the sum of its proper divisors (51441827).

89780061 is a wasteful number, since it uses less digits than its factorization.

89780061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137952.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 89780061 is about 9475.2340868181. The cubic root of 89780061 is about 447.7751266341.

The spelling of 89780061 in words is "eighty-nine million, seven hundred eighty thousand, sixty-one".