87878783 has 2 divisors, whose sum is σ = 87878784. Its totient is φ = 87878782.

The previous prime is 87878773. The next prime is 87878807. The reversal of 87878783 is 38787878.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87878783 is a prime.

It is a super-2 number, since 2×87878783² = 15445361003122178, which contains 22 as substring.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87878723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43939391 + 43939392.

It is an arithmetic number, because the mean of its divisors is an integer number (43939392).

Almost surely, 2^87878783 is an apocalyptic number.

87878783 is a deficient number, since it is larger than the sum of its proper divisors (1).

87878783 is an equidigital number, since it uses as much as digits as its factorization.

87878783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4214784, while the sum is 56.

The square root of 87878783 is about 9374.3684053914. The cubic root of 87878783 is about 444.5916938181.

The spelling of 87878783 in words is "eighty-seven million, eight hundred seventy-eight thousand, seven hundred eighty-three".