61878803 has 4 divisors (see below), whose sum is σ = 70718640. Its totient is φ = 53038968.

The previous prime is 61878781. The next prime is 61878811. The reversal of 61878803 is 30887816.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61878803 - 2¹² = 61874707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61878833) 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 3 ways as a sum of consecutive naturals, for example, 4419908 + ... + 4419921.

It is an arithmetic number, because the mean of its divisors is an integer number (17679660).

Almost surely, 2^61878803 is an apocalyptic number.

61878803 is a deficient number, since it is larger than the sum of its proper divisors (8839837).

61878803 is an equidigital number, since it uses as much as digits as its factorization.

61878803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8839836.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 61878803 is about 7866.3080921103. The cubic root of 61878803 is about 395.5310978012.

The spelling of 61878803 in words is "sixty-one million, eight hundred seventy-eight thousand, eight hundred three".