61803839 has 2 divisors, whose sum is σ = 61803840. Its totient is φ = 61803838.

The previous prime is 61803821. The next prime is 61803853. The reversal of 61803839 is 93830816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61803839 - 2²⁴ = 45026623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61803869) 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 as a sum of consecutive naturals, namely, 30901919 + 30901920.

It is an arithmetic number, because the mean of its divisors is an integer number (30901920).

Almost surely, 2^61803839 is an apocalyptic number.

61803839 is a deficient number, since it is larger than the sum of its proper divisors (1).

61803839 is an equidigital number, since it uses as much as digits as its factorization.

61803839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 61803839 is about 7861.5417699075. The cubic root of 61803839 is about 395.3713092393.

The spelling of 61803839 in words is "sixty-one million, eight hundred three thousand, eight hundred thirty-nine".