87651803 has 2 divisors, whose sum is σ = 87651804. Its totient is φ = 87651802.

The previous prime is 87651799. The next prime is 87651841. The reversal of 87651803 is 30815678.

It is an a-pointer prime, because the next prime (87651841) can be obtained adding 87651803 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87651803 - 2² = 87651799 is a prime.

It is not a weakly prime, because it can be changed into another prime (87651103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43825901 + 43825902.

It is an arithmetic number, because the mean of its divisors is an integer number (43825902).

Almost surely, 2^87651803 is an apocalyptic number.

87651803 is a deficient number, since it is larger than the sum of its proper divisors (1).

87651803 is an equidigital number, since it uses as much as digits as its factorization.

87651803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 87651803 is about 9362.2541623265. The cubic root of 87651803 is about 444.2085887181.

The spelling of 87651803 in words is "eighty-seven million, six hundred fifty-one thousand, eight hundred three".