87898777 has 2 divisors, whose sum is σ = 87898778. Its totient is φ = 87898776.

The previous prime is 87898763. The next prime is 87898813. The reversal of 87898777 is 77789878.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87160896 + 737881 = 9336^2 + 859^2 .

It is a cyclic number.

It is not a de Polignac number, because 87898777 - 2⁷ = 87898649 is a prime.

It is not a weakly prime, because it can be changed into another prime (87898757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43949388 + 43949389.

It is an arithmetic number, because the mean of its divisors is an integer number (43949389).

Almost surely, 2^87898777 is an apocalyptic number.

It is an amenable number.

87898777 is a deficient number, since it is larger than the sum of its proper divisors (1).

87898777 is an equidigital number, since it uses as much as digits as its factorization.

87898777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11063808, while the sum is 61.

The square root of 87898777 is about 9375.4347632523. The cubic root of 87898777 is about 444.6254087906.

The spelling of 87898777 in words is "eighty-seven million, eight hundred ninety-eight thousand, seven hundred seventy-seven".