61355903 has 8 divisors (see below), whose sum is σ = 71009280. Its totient is φ = 51924600.

The previous prime is 61355897. The next prime is 61355933. The reversal of 61355903 is 30955316.

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

It is not a de Polignac number, because 61355903 - 2⁴ = 61355887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61355903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61355933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54923 + ... + 56028.

It is an arithmetic number, because the mean of its divisors is an integer number (8876160).

Almost surely, 2^61355903 is an apocalyptic number.

61355903 is a deficient number, since it is larger than the sum of its proper divisors (9653377).

61355903 is a wasteful number, since it uses less digits than its factorization.

61355903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111037.

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 61355903 is about 7833.0008936550. Note that the first 3 decimals coincide. The cubic root of 61355903 is about 394.4138140659.

The spelling of 61355903 in words is "sixty-one million, three hundred fifty-five thousand, nine hundred three".