87775651 has 2 divisors, whose sum is σ = 87775652. Its totient is φ = 87775650.

The previous prime is 87775621. The next prime is 87775703. The reversal of 87775651 is 15657778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87775651 - 2⁵ = 87775619 is a prime.

It is not a weakly prime, because it can be changed into another prime (87775621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43887825 + 43887826.

It is an arithmetic number, because the mean of its divisors is an integer number (43887826).

Almost surely, 2^87775651 is an apocalyptic number.

87775651 is a deficient number, since it is larger than the sum of its proper divisors (1).

87775651 is an equidigital number, since it uses as much as digits as its factorization.

87775651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 411600, while the sum is 46.

The square root of 87775651 is about 9368.8660466462. The cubic root of 87775651 is about 444.4177057502.

The spelling of 87775651 in words is "eighty-seven million, seven hundred seventy-five thousand, six hundred fifty-one".