61785403 has 2 divisors, whose sum is σ = 61785404. Its totient is φ = 61785402.

The previous prime is 61785391. The next prime is 61785413. The reversal of 61785403 is 30458716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61785403 - 2⁵ = 61785371 is a prime.

It is not a weakly prime, because it can be changed into another prime (61785413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30892701 + 30892702.

It is an arithmetic number, because the mean of its divisors is an integer number (30892702).

Almost surely, 2^61785403 is an apocalyptic number.

61785403 is a deficient number, since it is larger than the sum of its proper divisors (1).

61785403 is an equidigital number, since it uses as much as digits as its factorization.

61785403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 61785403 is about 7860.3691389145. The cubic root of 61785403 is about 395.3319924241.

The spelling of 61785403 in words is "sixty-one million, seven hundred eighty-five thousand, four hundred three".