61033985 has 32 divisors (see below), whose sum is σ = 80424960. Its totient is φ = 44307648.

The previous prime is 61033981. The next prime is 61033993. The reversal of 61033985 is 58933016.

It is a cyclic number.

It is not a de Polignac number, because 61033985 - 2² = 61033981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61033981) 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 31 ways as a sum of consecutive naturals, for example, 273584 + ... + 273806.

It is an arithmetic number, because the mean of its divisors is an integer number (2513280).

Almost surely, 2^61033985 is an apocalyptic number.

It is an amenable number.

61033985 is a deficient number, since it is larger than the sum of its proper divisors (19390975).

61033985 is a wasteful number, since it uses less digits than its factorization.

61033985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 61033985 is about 7812.4250396404. The cubic root of 61033985 is about 393.7228095779.

The spelling of 61033985 in words is "sixty-one million, thirty-three thousand, nine hundred eighty-five".