61603061 has 8 divisors (see below), whose sum is σ = 66634680. Its totient is φ = 56613312.

The previous prime is 61603057. The next prime is 61603063. The reversal of 61603061 is 16030616.

It can be written as a sum of positive squares in 4 ways, for example, as 24940036 + 36663025 = 4994^2 + 6055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61603061 - 2² = 61603057 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 (61603063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7370 + ... + 13323.

It is an arithmetic number, because the mean of its divisors is an integer number (8329335).

Almost surely, 2^61603061 is an apocalyptic number.

It is an amenable number.

61603061 is a deficient number, since it is larger than the sum of its proper divisors (5031619).

61603061 is a wasteful number, since it uses less digits than its factorization.

61603061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20935.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 61603061 is about 7848.7617494736. The cubic root of 61603061 is about 394.9427059986.

Adding to 61603061 its reverse (16030616), we get a palindrome (77633677).

The spelling of 61603061 in words is "sixty-one million, six hundred three thousand, sixty-one".