87937961 has 2 divisors, whose sum is σ = 87937962. Its totient is φ = 87937960.

The previous prime is 87937943. The next prime is 87937999. The reversal of 87937961 is 16973978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87534736 + 403225 = 9356^2 + 635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87937961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87937921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43968980 + 43968981.

It is an arithmetic number, because the mean of its divisors is an integer number (43968981).

Almost surely, 2^87937961 is an apocalyptic number.

It is an amenable number.

87937961 is a deficient number, since it is larger than the sum of its proper divisors (1).

87937961 is an equidigital number, since it uses as much as digits as its factorization.

87937961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 87937961 is about 9377.5242468362. The cubic root of 87937961 is about 444.6914681617.

The spelling of 87937961 in words is "eighty-seven million, nine hundred thirty-seven thousand, nine hundred sixty-one".