87956081 has 2 divisors, whose sum is σ = 87956082. Its totient is φ = 87956080.

The previous prime is 87956069. The next prime is 87956137. The reversal of 87956081 is 18065978.

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., 85396081 + 2560000 = 9241^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 87956081 - 2⁶ = 87956017 is a prime.

It is a super-2 number, since 2×87956081² = 15472544369757122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87956051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43978040 + 43978041.

It is an arithmetic number, because the mean of its divisors is an integer number (43978041).

Almost surely, 2^87956081 is an apocalyptic number.

It is an amenable number.

87956081 is a deficient number, since it is larger than the sum of its proper divisors (1).

87956081 is an equidigital number, since it uses as much as digits as its factorization.

87956081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 87956081 is about 9378.4903369359. The cubic root of 87956081 is about 444.7220096023.

The spelling of 87956081 in words is "eighty-seven million, nine hundred fifty-six thousand, eighty-one".