86869961 has 2 divisors, whose sum is σ = 86869962. Its totient is φ = 86869960.

The previous prime is 86869931. The next prime is 86869987. The reversal of 86869961 is 16996868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81721600 + 5148361 = 9040^2 + 2269^2 .

It is a cyclic number.

It is not a de Polignac number, because 86869961 - 2¹⁸ = 86607817 is a prime.

It is not a weakly prime, because it can be changed into another prime (86869921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43434980 + 43434981.

It is an arithmetic number, because the mean of its divisors is an integer number (43434981).

Almost surely, 2^86869961 is an apocalyptic number.

It is an amenable number.

86869961 is a deficient number, since it is larger than the sum of its proper divisors (1).

86869961 is an equidigital number, since it uses as much as digits as its factorization.

86869961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 53.

The square root of 86869961 is about 9320.4056242204. The cubic root of 86869961 is about 442.8838823506.

The spelling of 86869961 in words is "eighty-six million, eight hundred sixty-nine thousand, nine hundred sixty-one".