61089983 has 4 divisors (see below), whose sum is σ = 61126968. Its totient is φ = 61053000.

The previous prime is 61089967. The next prime is 61089991. The reversal of 61089983 is 38998016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61089983 - 2⁴ = 61089967 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 (61089913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15893 + ... + 19358.

It is an arithmetic number, because the mean of its divisors is an integer number (15281742).

Almost surely, 2^61089983 is an apocalyptic number.

61089983 is a deficient number, since it is larger than the sum of its proper divisors (36985).

61089983 is a wasteful number, since it uses less digits than its factorization.

61089983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36984.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 61089983 is about 7816.0081243561. The cubic root of 61089983 is about 393.8431848654.

The spelling of 61089983 in words is "sixty-one million, eighty-nine thousand, nine hundred eighty-three".