61391803 has 8 divisors (see below), whose sum is σ = 68071536. Its totient is φ = 54895200.

The previous prime is 61391797. The next prime is 61391819. The reversal of 61391803 is 30819316.

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 61391803 - 2¹³ = 61383611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61391833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45076 + ... + 46417.

It is an arithmetic number, because the mean of its divisors is an integer number (8508942).

Almost surely, 2^61391803 is an apocalyptic number.

61391803 is a deficient number, since it is larger than the sum of its proper divisors (6679733).

61391803 is a wasteful number, since it uses less digits than its factorization.

61391803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91565.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 61391803 is about 7835.2921451596. The cubic root of 61391803 is about 394.4907243251.

It can be divided in two parts, 613 and 91803, that added together give a square (92416 = 304²).

The spelling of 61391803 in words is "sixty-one million, three hundred ninety-one thousand, eight hundred three".