61603901 has 6 divisors (see below), whose sum is σ = 62113950. Its totient is φ = 61095288.

The previous prime is 61603879. The next prime is 61603933. The reversal of 61603901 is 10930616.

It can be written as a sum of positive squares in only one way, i.e., 41344900 + 20259001 = 6430^2 + 4501^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61603901 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 (61603501) 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 5 ways as a sum of consecutive naturals, for example, 95486 + ... + 96128.

It is an arithmetic number, because the mean of its divisors is an integer number (10352325).

Almost surely, 2^61603901 is an apocalyptic number.

It is an amenable number.

61603901 is a deficient number, since it is larger than the sum of its proper divisors (510049).

61603901 is an frugal number, since it uses more digits than its factorization.

61603901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 61603901 is about 7848.8152609168. The cubic root of 61603901 is about 394.9445010954.

The spelling of 61603901 in words is "sixty-one million, six hundred three thousand, nine hundred one".