87756797 has 2 divisors, whose sum is σ = 87756798. Its totient is φ = 87756796.

The previous prime is 87756793. The next prime is 87756803. The reversal of 87756797 is 79765778.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66031876 + 21724921 = 8126^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 87756797 - 2² = 87756793 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87756793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43878398 + 43878399.

It is an arithmetic number, because the mean of its divisors is an integer number (43878399).

Almost surely, 2^87756797 is an apocalyptic number.

It is an amenable number.

87756797 is a deficient number, since it is larger than the sum of its proper divisors (1).

87756797 is an equidigital number, since it uses as much as digits as its factorization.

87756797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5186160, while the sum is 56.

The square root of 87756797 is about 9367.8597875929. The cubic root of 87756797 is about 444.3858835180.

The spelling of 87756797 in words is "eighty-seven million, seven hundred fifty-six thousand, seven hundred ninety-seven".