61782887 has 2 divisors, whose sum is σ = 61782888. Its totient is φ = 61782886.

The previous prime is 61782881. The next prime is 61782923. The reversal of 61782887 is 78828716.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61782887 - 2⁸ = 61782631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61782881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30891443 + 30891444.

It is an arithmetic number, because the mean of its divisors is an integer number (30891444).

Almost surely, 2^61782887 is an apocalyptic number.

61782887 is a deficient number, since it is larger than the sum of its proper divisors (1).

61782887 is an equidigital number, since it uses as much as digits as its factorization.

61782887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 47.

The square root of 61782887 is about 7860.2090939109. The cubic root of 61782887 is about 395.3266261685.

The spelling of 61782887 in words is "sixty-one million, seven hundred eighty-two thousand, eight hundred eighty-seven".